diff --git a/src/ol/format/ogc/filter.js b/src/ol/format/ogc/filter.js
index 0af819fc19..c4c5422f13 100644
--- a/src/ol/format/ogc/filter.js
+++ b/src/ol/format/ogc/filter.js
@@ -18,6 +18,7 @@ goog.provide('ol.format.ogc.filter.IsNull');
 goog.provide('ol.format.ogc.filter.IsBetween');
 goog.provide('ol.format.ogc.filter.IsLike');
 
+goog.require('ol.Extent');
 goog.require('ol.Object');
 
 
diff --git a/src/ol/typedefs.js b/src/ol/typedefs.js
index 50d2e24bf5..38863528d9 100644
--- a/src/ol/typedefs.js
+++ b/src/ol/typedefs.js
@@ -2,6 +2,7 @@
  * File for all top-level (in the `ol` namespace) typedefs used by the compiler,
  * and referenced by JSDoc.
  */
+goog.provide('ol.Extent');
 
 
 /**
diff --git a/tasks/build.js b/tasks/build.js
index 8573ac5b30..445d780589 100644
--- a/tasks/build.js
+++ b/tasks/build.js
@@ -207,9 +207,6 @@ function build(config, paths, callback) {
   } else {
     log.info('ol', 'Compiling ' + paths.length + ' sources');
     options.compile.js = paths.concat(options.compile.js || []);
-    // typedefs file has no `goog.provide`s, so is ignored by closure-util
-    // when calculating dependencies. So it's added here as a compiler option.
-    options.compile.js.push('src/ol/typedefs.js');
     closure.compile(options, callback);
   }
 }