diff --git a/converters/php5-mbstring/files/patch-config.m4 b/converters/php5-mbstring/files/patch-config.m4
new file mode 100644
index 000000000000..619440601c7a
--- /dev/null
+++ b/converters/php5-mbstring/files/patch-config.m4
@@ -0,0 +1,10 @@
+--- config.m4.orig	Fri Sep  8 07:42:50 2006
++++ config.m4	Fri Sep  8 07:43:00 2006
+@@ -66,7 +66,6 @@
+ int foo(int x, ...) {
+ 	va_list va;
+ 	va_start(va, x);
+-	va_arg(va, int);
+ 	va_arg(va, char *);
+ 	va_arg(va, double);
+ 	return 0;