diff --git a/hack/utils/installdefinition.sh b/hack/utils/installdefinition.sh
index 8f8d8c029..8af773634 100755
--- a/hack/utils/installdefinition.sh
+++ b/hack/utils/installdefinition.sh
@@ -16,7 +16,7 @@ function check_install() {
   for file in *.yaml ;
     do
       echo "Info: changing "$DEF_PATH"/"$file
-      sed -i.bak "s#namespace: {{.Values.systemDefinitionNamespace}}#namespace: vela-system#g" $file
+      sed -i.bak "s#namespace: {{ include \"systemDefinitionNamespace\" . }}#namespace: vela-system#g" $file
       kubectl apply -f $file
       rm $file
       mv $file".bak" $file
@@ -29,4 +29,4 @@ check_install
 
 DEF_PATH="charts/vela-core/templates/definitions"
 
-check_install
\ No newline at end of file
+check_install