diff --git a/ChangeLog b/ChangeLog
index acc4e89a1..a2dfd5cf4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2005-02-28  Mike Kestner  <mkestner@novell.com>
+
+	* gdk/Region.custom : 64 bit fix for ptr arithmetic. [Fixes #77658]
 
 Tue Feb 28 09:44:23 CET 2006 Paolo Molaro <lupus@ximian.com>
 
diff --git a/gdk/Region.custom b/gdk/Region.custom
index 40c5beccf..b7aad4187 100644
--- a/gdk/Region.custom
+++ b/gdk/Region.custom
@@ -34,7 +34,7 @@ public Rectangle[] GetRectangles ()
 
 	Rectangle[] ret = new Rectangle[n];
 	int step = Marshal.SizeOf(typeof(Rectangle));
-	int ptr = (int)rectangles;
+	long ptr = (long)rectangles;
 	for (int i = 0; i < n; i++) {
 		ret[i] = (Rectangle)Marshal.PtrToStructure((IntPtr)ptr, typeof(Rectangle));
 		ptr += step;