diff --git a/config/description.exs b/config/description.exs
index dd9e46c08..6fa78a5d1 100644
--- a/config/description.exs
+++ b/config/description.exs
@@ -58,7 +58,7 @@
   },
   %{
     key: "build_dir",
-    label: "Build directory"
+    label: "Build directory",
     type: :string,
     description: "The directory inside the zip file "
   }