diff --git a/sys/dev/drm/drm_agpsupport.c b/sys/dev/drm/drm_agpsupport.c
--- a/sys/dev/drm/drm_agpsupport.c
+++ b/sys/dev/drm/drm_agpsupport.c
@@ -77,6 +77,7 @@
 		       struct drm_file *file_priv)
 {
 	struct drm_agp_info info;
+	memset(&info, 0, sizeof(info));
 	int err;
 
 	err = drm_agp_info(dev, &info);