diff --git a/stack.sh b/stack.sh
index dff6bd3..7da1fb9 100755
--- a/stack.sh
+++ b/stack.sh
@@ -150,7 +150,7 @@
 fi
 
 # Look for obsolete stuff
-if [[ ,${ENABLED_SERVICES} =~ ,"swift" ]]; then
+if [[ ,${ENABLED_SERVICES}, =~ ,"swift", ]]; then
     echo "FATAL: 'swift' is not supported as a service name"
     echo "FATAL: Use the actual swift service names to enable tham as required:"
     echo "FATAL: s-proxy s-object s-container s-account"