diff --git a/src/i830_dri.c b/src/i830_dri.c
index 56029e4..055faf1 100644
--- a/src/i830_dri.c
+++ b/src/i830_dri.c
@@ -1741,7 +1741,7 @@ I830DRISetVBlankInterrupt (ScrnInfoPtr pScrn, Bool on)
 
     if (pI830->directRenderingEnabled && pI830->drmMinor >= 5) {
 	if (on) {
-	    if (xf86_config->num_crtc > 1 && xf86_config->crtc[1]->enabled)
+	    if (xf86_config->crtc[1]->enabled)
 		if (pI830->drmMinor >= 6)
 		    pipe.pipe = DRM_I830_VBLANK_PIPE_A | DRM_I830_VBLANK_PIPE_B;
 		else