diff --git a/wp-admin/custom-header.php b/wp-admin/custom-header.php
index 3909c79384..57847c2327 100644
--- a/wp-admin/custom-header.php
+++ b/wp-admin/custom-header.php
@@ -232,6 +232,15 @@ class Custom_Image_Header {
 		var ratio = xinit / yinit;
 		var ximg = jQuery('#upload').width();
 		var yimg = jQuery('#upload').height();
+		
+		//set up default values
+		jQuery( '#x1' ).val(0);
+		jQuery( '#y1' ).val(0);
+		jQuery( '#x2' ).val(xinit);
+		jQuery( '#y2' ).val(yinit);
+		jQuery( '#width' ).val(xinit);
+		jQuery( '#height' ).val(yinit);
+		
 		if ( yimg < yinit || ximg < xinit ) {
 			if ( ximg / yimg > ratio ) {
 				yinit = yimg;