diff --git a/include/epoxy/gl.h b/include/epoxy/gl.h
index 3eae4b6..593272b 100644
--- a/include/epoxy/gl.h
+++ b/include/epoxy/gl.h
@@ -54,6 +54,7 @@ extern "C" {
 /* APIENTRY and GLAPIENTRY are not used on Linux or Mac. */
 #define APIENTRY
 #define GLAPIENTRY
+#define GLAPI
 #else
 #ifndef APIENTRY
 #define APIENTRY __stdcall
@@ -68,6 +69,14 @@ extern "C" {
 #endif
 #endif /* _WIN32 */
 
+#ifndef APIENTRYP
+#define APIENTRYP APIENTRY *
+#endif
+
+#ifndef GLAPIENTRYP
+#define GLAPIENTRYP GLAPIENTRY *
+#endif
+
 #include "epoxy/gl_generated.h"
 #include "epoxy/gl_generated_vtable_defines.h"