diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c
index 0b0ccab9509..fa37e37b4df 100644
--- a/ext/gd/libgd/gd.c
+++ b/ext/gd/libgd/gd.c
@@ -1739,6 +1739,7 @@ gdImageCopy (gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int s
 	  /* Destination is palette based */
 
     if (src->trueColor) {  /* But source is truecolor (Ouch!) */
+		toy = dstY;
         for (y = srcY; (y < (srcY + h)); y++)
         {
             tox = dstX;