diff --git a/include/GL/internal/glcore.h b/include/GL/internal/glcore.h
index 057ad0837ef..f3b180c165c 100644
--- a/include/GL/internal/glcore.h
+++ b/include/GL/internal/glcore.h
@@ -314,7 +314,9 @@ struct __GLdrawablePrivateRec {
     void (*unlockDP)(__GLdrawablePrivate *glPriv);
 
     /* exported */
+#if 0 /* disable, just like in __GLimportsRec */
     void *wsPriv;	/* pointer to the window system DrawablePrivate */
+#endif
 #ifdef __cplusplus
     void *privatePtr;
 #else