diff --git a/setupenv.bashrc b/setupenv.bashrc
index 6b007ec..abf30d6 100644
--- a/setupenv.bashrc
+++ b/setupenv.bashrc
@@ -44,6 +44,4 @@ if [ -f "$PROJECT_BASE_DIR/.localenv.bashrc" ]; then
     source "$PROJECT_BASE_DIR/.localenv.bashrc"
 fi
 
-unset PROJECT_BASE_DIR
-
 echo "done."