diff --git a/src/i830_driver.c b/src/i830_driver.c
index f41beb0..08626fb 100644
--- a/src/i830_driver.c
+++ b/src/i830_driver.c
@@ -2532,7 +2532,8 @@ I830ScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 
 	 if (pI830->LinearAlloc &&
 	     xf86InitFBManagerLinear(pScreen,
-				     pI830->xaa_linear->offset / pI830->cpp,
+				     (pI830->xaa_linear->offset -
+				      pI830->front_buffer->offset) / pI830->cpp,
 				     pI830->xaa_linear->size / pI830->cpp))
 	 {
             xf86DrvMsg(scrnIndex, X_INFO,