diff --git a/glm/core/setup.hpp b/glm/core/setup.hpp
index f411ddc0..a7098d68 100644
--- a/glm/core/setup.hpp
+++ b/glm/core/setup.hpp
@@ -401,21 +401,4 @@
 #	endif
 #endif//GLM_MESSAGE
 
-///////////////////////////////////////////////////////////////////////////////////////////////////
-// Precision
-/*
-#define GLM_PRECISION_NONE			0x00000000
-
-#define GLM_PRECISION_LOWP_FLOAT	0x00000011
-#define GLM_PRECISION_MEDIUMP_FLOAT	0x00000012
-#define GLM_PRECISION_HIGHP_FLOAT	0x00000013	
-
-#define GLM_PRECISION_LOWP_INT		0x00001100
-#define GLM_PRECISION_MEDIUMP_INT	0x00001200
-#define GLM_PRECISION_HIGHP_INT		0x00001300
-
-#define GLM_PRECISION_LOWP_UINT		0x00110000
-#define GLM_PRECISION_MEDIUMP_UINT	0x00120000
-#define GLM_PRECISION_HIGHP_UINT	0x00130000	
-*/
 #endif//glm_setup
diff --git a/glm/core/type.hpp b/glm/core/type.hpp
index 599163ba..0117c3c4 100644
--- a/glm/core/type.hpp
+++ b/glm/core/type.hpp
@@ -38,7 +38,7 @@ namespace type
 	//////////////////////////
 	// Float definition
 
-#if(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_HIGHP_FLOAT)
+#if(defined(GLM_PRECISION_HIGHP_FLOAT))
 	typedef precision::highp_vec2		vec2;
 	typedef precision::highp_vec3		vec3;
 	typedef precision::highp_vec4		vec4;
@@ -51,7 +51,7 @@ namespace type
 	typedef precision::highp_mat4x2		mat4x2;
 	typedef precision::highp_mat4x3		mat4x3;
 	typedef precision::highp_mat4x4		mat4x4;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_MEDIUMP_FLOAT)
+#elif(defined(GLM_PRECISION_MEDIUMP_FLOAT))
 	typedef precision::mediump_vec2		vec2;
 	typedef precision::mediump_vec3		vec3;
 	typedef precision::mediump_vec4		vec4;
@@ -64,7 +64,7 @@ namespace type
 	typedef precision::mediump_mat4x2	mat4x2;
 	typedef precision::mediump_mat4x3	mat4x3;
 	typedef precision::mediump_mat4x4	mat4x4;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_LOWP_FLOAT)
+#elif(defined(GLM_PRECISION_LOWP_FLOAT))
 	typedef precision::lowp_vec2			vec2;
 	typedef precision::lowp_vec3			vec3;
 	typedef precision::lowp_vec4			vec4;
@@ -158,15 +158,15 @@ namespace type
 	//////////////////////////
 	// Signed integer definition
 
-#if(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_HIGHP_INT)
+#if(defined(GLM_PRECISION_HIGHP_INT))
 	typedef precision::highp_ivec2			ivec2;
 	typedef precision::highp_ivec3			ivec3;
 	typedef precision::highp_ivec4			ivec4;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_MEDIUMP_INT)
+#elif(defined(GLM_PRECISION_MEDIUMP_INT))
 	typedef precision::mediump_ivec2		ivec2;
 	typedef precision::mediump_ivec3		ivec3;
 	typedef precision::mediump_ivec4		ivec4;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_LOWP_INT)
+#elif(defined(GLM_PRECISION_LOWP_INT))
 	typedef precision::lowp_ivec2			ivec2;
 	typedef precision::lowp_ivec3			ivec3;
 	typedef precision::lowp_ivec4			ivec4;
@@ -190,15 +190,15 @@ namespace type
 	//////////////////////////
 	// Unsigned integer definition
 
-#if(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_HIGHP_UINT)
+#if(defined(GLM_PRECISION_HIGHP_UINT))
 	typedef precision::highp_uvec2			uvec2;
 	typedef precision::highp_uvec3			uvec3;
 	typedef precision::highp_uvec4			uvec4;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_MEDIUMP_UINT)
+#elif(defined(GLM_PRECISION_MEDIUMP_UINT))
 	typedef precision::mediump_uvec2		uvec2;
 	typedef precision::mediump_uvec3		uvec3;
 	typedef precision::mediump_uvec4		uvec4;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_LOWP_UINT)
+#elif(defined(GLM_PRECISION_LOWP_UINT))
 	typedef precision::lowp_uvec2			uvec2;
 	typedef precision::lowp_uvec3			uvec3;
 	typedef precision::lowp_uvec4			uvec4;
diff --git a/glm/gtc/matrix_integer.hpp b/glm/gtc/matrix_integer.hpp
index 079dafc8..cfd487b8 100644
--- a/glm/gtc/matrix_integer.hpp
+++ b/glm/gtc/matrix_integer.hpp
@@ -117,11 +117,10 @@ namespace glm
 		typedef detail::tmat4x3<lowp_uint>				lowp_umat4x3; //!< \brief Low-precision signed integer 4x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef detail::tmat4x4<lowp_uint>				lowp_umat4x4; //!< \brief Low-precision signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
 
-#if(defined(GLM_PRECISION) && (GLM_PRECISION & GLM_PRECISION_HIGHP_INT))
+#if(defined(GLM_PRECISION_HIGHP_INT))
 		typedef highp_imat2								imat2; //!< \brief Signed integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_imat3								imat3; //!< \brief Signed integer 3x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_imat4								imat4; //!< \brief Signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
-
 		typedef highp_imat2x2							imat2x2; //!< \brief Signed integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_imat2x3							imat2x3; //!< \brief Signed integer 2x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_imat2x4							imat2x4; //!< \brief Signed integer 2x4 matrix. (from GLM_GTC_matrix_integer extension)
@@ -131,8 +130,7 @@ namespace glm
 		typedef highp_imat4x2							imat4x2; //!< \brief Signed integer 4x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_imat4x3							imat4x3; //!< \brief Signed integer 4x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_imat4x4							imat4x4; //!< \brief Signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
-
-#elif(defined(GLM_PRECISION) && (GLM_PRECISION & GLM_PRECISION_LOWP_INT))
+#elif(defined(GLM_PRECISION_LOWP_INT))
 		typedef lowp_imat2								imat2; //!< \brief Signed integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_imat3								imat3; //!< \brief Signed integer 3x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_imat4								imat4; //!< \brief Signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
@@ -145,8 +143,7 @@ namespace glm
 		typedef lowp_imat4x2							imat4x2; //!< \brief Signed integer 4x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_imat4x3							imat4x3; //!< \brief Signed integer 4x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_imat4x4							imat4x4; //!< \brief Signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
-
-#else //if(defined(GLM_PRECISION) && (GLM_PRECISION & GLM_PRECISION_MEDIUMP_INT))
+#else //if(defined(GLM_PRECISION_MEDIUMP_INT))
 		typedef mediump_imat2							imat2; //!< \brief Signed integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef mediump_imat3							imat3; //!< \brief Signed integer 3x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef mediump_imat4							imat4; //!< \brief Signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
@@ -161,7 +158,7 @@ namespace glm
 		typedef mediump_imat4x4							imat4x4; //!< \brief Signed integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
 #endif//GLM_PRECISION
 
-#if(defined(GLM_PRECISION) && (GLM_PRECISION & GLM_PRECISION_HIGHP_UINT))
+#if(defined(GLM_PRECISION_HIGHP_UINT))
 		typedef highp_umat2								umat2; //!< \brief Unsigned integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_umat3								umat3; //!< \brief Unsigned integer 3x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_umat4								umat4; //!< \brief Unsigned integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
@@ -174,8 +171,7 @@ namespace glm
 		typedef highp_umat4x2							umat4x2; //!< \brief Unsigned integer 4x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_umat4x3							umat4x3; //!< \brief Unsigned integer 4x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef highp_umat4x4							umat4x4; //!< \brief Unsigned integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
-
-#elif(defined(GLM_PRECISION) && (GLM_PRECISION & GLM_PRECISION_LOWP_UINT))
+#elif(defined(GLM_PRECISION_LOWP_UINT))
 		typedef lowp_umat2								umat2; //!< \brief Unsigned integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_umat3								umat3; //!< \brief Unsigned integer 3x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_umat4								umat4; //!< \brief Unsigned integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
@@ -188,8 +184,7 @@ namespace glm
 		typedef lowp_umat4x2							umat4x2; //!< \brief Unsigned integer 4x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_umat4x3							umat4x3; //!< \brief Unsigned integer 4x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef lowp_umat4x4							umat4x4; //!< \brief Unsigned integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
-
-#else //if(defined(GLM_PRECISION) && (GLM_PRECISION & GLM_PRECISION_MEDIUMP_UINT))
+#else //if(defined(GLM_PRECISION_MEDIUMP_UINT))
 		typedef mediump_umat2							umat2; //!< \brief Unsigned integer 2x2 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef mediump_umat3							umat3; //!< \brief Unsigned integer 3x3 matrix. (from GLM_GTC_matrix_integer extension)
 		typedef mediump_umat4							umat4; //!< \brief Unsigned integer 4x4 matrix. (from GLM_GTC_matrix_integer extension)
diff --git a/glm/gtx/vec1.hpp b/glm/gtx/vec1.hpp
index 0da37451..df7fb1d4 100644
--- a/glm/gtx/vec1.hpp
+++ b/glm/gtx/vec1.hpp
@@ -80,11 +80,11 @@ namespace glm
 		//! From GLM_GTX_vec1 extension.
 		typedef detail::tvec1<bool>	bvec1;
 
-#if(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_HIGHP_FLOAT)
+#if(defined(GLM_PRECISION_HIGHP_FLOAT))
 		typedef precision::highp_vec1			vec1;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_MEDIUMP_FLOAT)
+#elif(defined(GLM_PRECISION_MEDIUMP_FLOAT))
 		typedef precision::mediump_vec1			vec1;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_LOWP_FLOAT)
+#elif(defined(GLM_PRECISION_LOWP_FLOAT))
 		typedef precision::lowp_vec1			vec1;
 #else
 		//! 1 component vector of floating-point numbers.
@@ -92,11 +92,11 @@ namespace glm
 		typedef precision::mediump_vec1			vec1;
 #endif//GLM_PRECISION
 
-#if(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_HIGHP_INT)
+#if(defined(GLM_PRECISION_HIGHP_INT))
 		typedef precision::highp_ivec1			ivec1;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_MEDIUMP_INT)
+#elif(defined(GLM_PRECISION_MEDIUMP_INT))
 		typedef precision::mediump_ivec1		ivec1;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_LOWP_INT)
+#elif(defined(GLM_PRECISION_LOWP_INT))
 		typedef precision::lowp_ivec1			ivec1;
 #else
 		//! 1 component vector of signed integer numbers. 
@@ -104,11 +104,11 @@ namespace glm
 		typedef precision::mediump_ivec1		ivec1;
 #endif//GLM_PRECISION
 
-#if(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_HIGHP_UINT)
+#if(defined(GLM_PRECISION_HIGHP_UINT))
 		typedef precision::highp_uvec1			uvec1;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_MEDIUMP_UINT)
+#elif(defined(GLM_PRECISION_MEDIUMP_UINT))
 		typedef precision::mediump_uvec1		uvec1;
-#elif(defined(GLM_PRECISION) && GLM_PRECISION & GLM_PRECISION_LOWP_UINT)
+#elif(defined(GLM_PRECISION_LOWP_UINT))
 		typedef precision::lowp_uvec1			uvec1;
 #else
 		//! 1 component vector of unsigned integer numbers. 
diff --git a/test/core/core_type_mat4x4.cpp b/test/core/core_type_mat4x4.cpp
index 65b85346..a821b91a 100644
--- a/test/core/core_type_mat4x4.cpp
+++ b/test/core/core_type_mat4x4.cpp
@@ -8,6 +8,7 @@
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #define GLM_MESSAGES
+#define GLM_PRECISION_HIGHP_FLOAT
 #include <glm/glm.hpp>
 #include <cstdio>