diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index ec0e03db..2d6cba4e 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -393,6 +393,7 @@ bool sna_crtc_is_bound(struct sna *sna, xf86CrtcPtr crtc)
 {
 	struct drm_mode_crtc mode;
 
+	VG_CLEAR(mode);
 	mode.crtc_id = crtc_id(crtc->driver_private);
 	if (drmIoctl(sna->kgem.fd, DRM_IOCTL_MODE_GETCRTC, &mode))
 		return false;