diff --git a/include/epoxy/glx.h b/include/epoxy/glx.h
index 9deb99f..3e6e5d1 100644
--- a/include/epoxy/glx.h
+++ b/include/epoxy/glx.h
@@ -39,6 +39,7 @@
 extern "C" {
 #endif
 
+#include <epoxy/gl.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <stdbool.h>