diff --git a/src/i830_dri.c b/src/i830_dri.c
index 6b17f466..3b029185 100644
--- a/src/i830_dri.c
+++ b/src/i830_dri.c
@@ -1526,7 +1526,7 @@ I830DRISetVBlankInterrupt (ScrnInfoPtr pScrn, Bool on)
 	}
 	if (drmCommandWrite(pI830->drmSubFD, DRM_I830_SET_VBLANK_PIPE,
 			    &pipe, sizeof (pipe))) {
-	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "I830 Vblank Pipe Setup Failed\n");
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "I830 Vblank Pipe Setup Failed %d\n", pipe.pipe);
 	    return FALSE;
 	}
     }