diff --git a/src/gamma.c b/src/gamma.c
index a82581dd..34cb22f5 100644
--- a/src/gamma.c
+++ b/src/gamma.c
@@ -43,7 +43,7 @@
 
 GLFWAPI void glfwSetGamma(float gamma)
 {
-    int i, size = 256;
+    int i, size = GLFW_GAMMA_RAMP_SIZE;
     GLFWgammaramp ramp;
 
     if (!_glfwInitialized)