diff --git a/include/GL/glfw3.h b/include/GL/glfw3.h
index e84bdbba..cc817521 100644
--- a/include/GL/glfw3.h
+++ b/include/GL/glfw3.h
@@ -136,10 +136,6 @@ extern "C" {
 
 /* -------------------- END SYSTEM/COMPILER SPECIFIC --------------------- */
 
-/* Include the declaration of the size_t type used below.
- */
-#include <stddef.h>
-
 /* Include standard OpenGL headers: GLFW uses GL_FALSE/GL_TRUE, and it is
  * convenient for the user to only have to include <GL/glfw.h>. This also
  * solves the problem with Windows <GL/gl.h> and <GL/glu.h> needing some