diff --git a/libsrc/include/incopengl.hpp b/libsrc/include/incopengl.hpp
index 9ce0d413..1f42f12f 100644
--- a/libsrc/include/incopengl.hpp
+++ b/libsrc/include/incopengl.hpp
@@ -5,7 +5,7 @@
 #include <mystdlib.h>
 #include <mydefs.hpp>
 
-#  if defined(TOGL_AGL) || defined(TOGL_AGL_CLASSIC) || defined(TOGL_NSOPENGL)
+#  ifdef __APPLE__
 #define GL_SILENCE_DEPRECATION
 #define GL_DO_NOT_WARN_IF_MULTI_GL_VERSION_HEADERS_INCLUDED
 #    include <OpenGL/gl3.h>