diff --git a/mozilla/lib/libmocha/et_moz.c b/mozilla/lib/libmocha/et_moz.c
index 1d17f9dd366..15696a7cfa7 100644
--- a/mozilla/lib/libmocha/et_moz.c
+++ b/mozilla/lib/libmocha/et_moz.c
@@ -37,6 +37,10 @@
 #include "netcache.h"
 #include "secnav.h"
 
+#ifdef XP_MAC	/* we need this header for a prototype, but I'm not sure if its the correct one */
+#include "secstubn.h"
+#endif
+
 #define IL_CLIENT
 #include "libimg.h"             /* Image Library public API. */