diff --git a/Makefile b/Makefile
index 993d1f3359251a23576ffb4ed903d1ccd7c0b7ef..324130c682dd947cf3d5f7be11b2e785a5fdf9a0 100644
--- a/Makefile
+++ b/Makefile
@@ -944,7 +944,7 @@ ifdef CONFIG_LOCALVERSION_AUTO
 	localver-extra = $(scm-identifier)
 else
 	ifneq ($(scm-identifier),)
-		ifeq ($(LOCALVERSION),)
+		ifeq ("$(origin LOCALVERSION)", "undefined")
 			localver-extra = +
 		endif
 	endif