diff --git a/src/platform/opengl/gles2.h b/src/platform/opengl/gles2.h
index 4d74fd2a1..2fc1eeac0 100644
--- a/src/platform/opengl/gles2.h
+++ b/src/platform/opengl/gles2.h
@@ -11,6 +11,7 @@
 #include <OpenGL/gl3.h>
 #else
 #include <GL/gl.h>
+#define GL_GLEXT_PROTOTYPES
 #include <GL/glext.h>
 #endif
 #else