diff --git a/src/imageurlfunction.js b/src/ol/imageurlfunction.js
similarity index 96%
rename from src/imageurlfunction.js
rename to src/ol/imageurlfunction.js
index bb328819eb..ebaec5c427 100644
--- a/src/imageurlfunction.js
+++ b/src/ol/imageurlfunction.js
@@ -1,6 +1,7 @@
 goog.provide('ol.ImageUrlFunction');
 goog.provide('ol.ImageUrlFunctionType');
 
+goog.require('goog.uri.utils');
 goog.require('ol.Extent');
 goog.require('ol.Size');
 
diff --git a/src/ol/source/singleimagewmssource.js b/src/ol/source/singleimagewmssource.js
index 3529678443..84e66db61f 100644
--- a/src/ol/source/singleimagewmssource.js
+++ b/src/ol/source/singleimagewmssource.js
@@ -1,5 +1,6 @@
 goog.provide('ol.source.SingleImageWMS');
 
+goog.require('goog.uri.utils');
 goog.require('ol.Extent');
 goog.require('ol.Image');
 goog.require('ol.ImageUrlFunction');