diff --git a/CMakeLists.txt b/CMakeLists.txt
index db927024..667c41c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,7 +89,7 @@ if(("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") OR ("${CMAKE_CXX_COMPILER_ID}"
 endif()
 
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-	add_definitions(-Weverything -Wpedantic -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-c++11-long-long -Wno-padded -Wno-documentation -Wno-gnu-anonymous-struct -Wno-nested-anon-types)
+	add_definitions(-Werror -Weverything -Wpedantic -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-c++11-long-long -Wno-padded -Wno-documentation -Wno-gnu-anonymous-struct -Wno-nested-anon-types)
 	add_definitions(-Wno-sign-conversion -Wno-unused-variable -Wno-missing-prototypes -Wno-unreachable-code -Wno-missing-variable-declarations -Wno-sign-compare -Wno-global-constructors -Wno-unused-macros -Wno-format-nonliteral)
 endif()