diff --git a/include/GL/glfw3.h b/include/GL/glfw3.h
index e902964c..1c8c4e1c 100644
--- a/include/GL/glfw3.h
+++ b/include/GL/glfw3.h
@@ -500,6 +500,7 @@ typedef struct
 /* Custom threading model interface */
 typedef struct
 {
+    int dummy;
 } GLFWthreadmodel;