diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 8c5e8b91a3cbbb6b35542e57b64365b608c4073b..0b69a7753558ff27a07748f2d5ca7f3f054b2ba2 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -158,7 +158,7 @@
 /* add more to the end as needed */
 
 #define fourcc_mod_code(vendor, val) \
-	((((u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | (val & 0x00ffffffffffffffULL))
+	((((__u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | (val & 0x00ffffffffffffffULL))
 
 /*
  * Format Modifier tokens: