diff --git a/exa/exa.c b/exa/exa.c
index 7b732ebf7..d7949fde9 100644
--- a/exa/exa.c
+++ b/exa/exa.c
@@ -72,8 +72,7 @@ exaGetPixmapOffset(PixmapPtr pPix)
 {
     ExaScreenPriv (pPix->drawable.pScreen);
 
-    return ((unsigned long)(unsigned long *)ExaGetPixmapAddress(pPix) -
-	    (unsigned long)pExaScr->info->memoryBase);
+    return (CARD8 *)ExaGetPixmapAddress(pPix) - pExaScr->info->memoryBase;
 }
 
 void *