--- GD.c	2001-05-30 16:14:17.000000000 +0200
+++ GD.c	2007-04-19 08:53:47.000000000 +0200
@@ -1374,6 +1374,7 @@
 
 static VALUE
 img_set_interlace(img, val)
+    VALUE img, val;
 {
     gdImagePtr im;