diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index e6e05bb75a77..05bb7311ac5d 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3802,7 +3802,7 @@ int drm_add_modes_noedid(struct drm_connector *connector,
 	struct drm_display_mode *mode;
 	struct drm_device *dev = connector->dev;
 
-	count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
+	count = ARRAY_SIZE(drm_dmt_modes);
 	if (hdisplay < 0)
 		hdisplay = 0;
 	if (vdisplay < 0)