diff --git a/recipes/mozilla/files/powerpc/jsautocfg.h b/recipes/mozilla/files/powerpc/jsautocfg.h
index 408a5e4..bc5da80 100644
--- a/recipes/mozilla/files/powerpc/jsautocfg.h
+++ b/recipes/mozilla/files/powerpc/jsautocfg.h
@@ -51,4 +51,6 @@
 
 #define JS_HAVE_LONG_LONG
 
+#define HAVE_VA_LIST_AS_ARRAY
+
 #endif /* js_cpucfg___ */