diff --git a/build/ol.json b/build/ol.json
index 935a6aac49..682799e8a7 100644
--- a/build/ol.json
+++ b/build/ol.json
@@ -4,6 +4,8 @@
 
   "inherits": "../base.json",
 
-  "inputs": "src/ol/ol.js"
+  "inputs": "src/ol/ol.js",
+
+  "output-wrapper": "(function(){%output%})();"
 
 }
diff --git a/build/ol3.json b/build/ol3.json
index 1a392513a3..19b0463cdf 100644
--- a/build/ol3.json
+++ b/build/ol3.json
@@ -4,6 +4,8 @@
 
   "inherits": "../base.json",
 
-  "inputs": "build/ol3.js"
+  "inputs": "build/ol3.js",
+
+  "output-wrapper": "(function(){%output%})();"
 
 }