diff --git a/packages/builder/src/builderStore/generate_css.js b/packages/builder/src/builderStore/generate_css.js
index 5d811c6f37..2bb5a3bd2e 100644
--- a/packages/builder/src/builderStore/generate_css.js
+++ b/packages/builder/src/builderStore/generate_css.js
@@ -26,6 +26,8 @@ export const generate_css = style => {
         return (str += `${key}: ${value.join(" ")};\n`)
       }
     }
+
+    return str
   }, "")
 
   return (cssString || "").trim()