diff --git a/ext/gd/config.m4 b/ext/gd/config.m4
index ba5969b2026..d5e618c4ca8 100644
--- a/ext/gd/config.m4
+++ b/ext/gd/config.m4
@@ -63,9 +63,11 @@ AC_ARG_WITH(gd,
                           Set DIR to "shared" to build as a dl, or 
                           "shared,DIR" to build as a dl and still specify DIR.],
 [
+  old_withval=$withval
   PHP_WITH_SHARED
   PHP_GD_JPEG
   PHP_GD_XPM
+  withval=$old_withval
 
   case "$withval" in
     no)