diff --git a/boot/boot.c b/boot/boot.c
index 424a94bc1..379db639c 100755
--- a/boot/boot.c
+++ b/boot/boot.c
@@ -503,7 +503,7 @@ void initialize(void)
 
 	/* Check if data segment crosses a 64K boundary. */
 	if (newaddr + (daddr - caddr) < dma64k)  {
-		newaddr= (dma64k - runsize) & ~0x0FFFFL;
+		newaddr= (dma64k - runsize) & ~0x0000FL;
 	}
 #endif