diff --git a/transforms/module.js b/transforms/module.js
index 7482a6ca3e..60b1848378 100644
--- a/transforms/module.js
+++ b/transforms/module.js
@@ -132,7 +132,7 @@ module.exports = function(info, api) {
   // replace `ol.VERSION = ''` with correct version
   root.find(j.ExpressionStatement, getMemberExpressionAssignment('ol.VERSION'))
     .forEach(path => {
-      path.value.expression.right = j.literal(thisPackage.version);
+      path.value.expression.right = j.literal('v' + thisPackage.version);
     });
 
   const replacements = {};