diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 3785d66..a6d773a 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -321,6 +321,9 @@
 		else
 			req->value = 64;
 		break;
+	case DRM_CAP_ADDFB2_MODIFIERS:
+		req->value = dev->mode_config.allow_fb_modifiers;
+		break;
 	default:
 		return -EINVAL;
 	}