diff --git a/src/style_manager/model/Property.js b/src/style_manager/model/Property.js
index ccbd84fa2..5f89a7828 100644
--- a/src/style_manager/model/Property.js
+++ b/src/style_manager/model/Property.js
@@ -201,7 +201,8 @@ const Property = Backbone.Model.extend(
       }
 
       if (fn && hasValue) {
-        value = `${fn}(${value})`;
+        const fnParameter = fn === 'url' ? `'${value}'` : value;
+        value = `${fn}(${fnParameter})`;
       }
 
       if (hasValue && this.get('important')) {