diff --git a/scripts/tags.sh b/scripts/tags.sh
index 6a551805db526ea5f40a24f9a64704e585ede801..70e14c67bde73b1e5e5856ebef812a5e4ba9ab4b 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -19,7 +19,7 @@ ignore="$ignore ( -name *.mod.c ) -prune -o"
 # Do not use full path if we do not use O=.. builds
 # Use make O=. {tags|cscope}
 # to force full paths for a non-O= build
-if [ "${srctree}" = "." ]; then
+if [ "${srctree}" = "." -o -z "${srctree}" ]; then
 	tree=
 else
 	tree=${srctree}/