diff --git a/mozilla/modules/libreg/src/vr_stubs.c b/mozilla/modules/libreg/src/vr_stubs.c
index 12fc3d76b84..24cc49ce2a4 100644
--- a/mozilla/modules/libreg/src/vr_stubs.c
+++ b/mozilla/modules/libreg/src/vr_stubs.c
@@ -41,6 +41,7 @@
 
 #ifdef STANDALONE_REGISTRY
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>