diff --git a/src/ol/interaction/condition.js b/src/ol/interaction/condition.js
index 3644843ddc..c0831f38ec 100644
--- a/src/ol/interaction/condition.js
+++ b/src/ol/interaction/condition.js
@@ -1,6 +1,8 @@
 goog.provide('ol.interaction.ConditionType');
 goog.provide('ol.interaction.condition');
 
+goog.require('goog.functions');
+
 
 /**
  * @typedef {function(goog.events.BrowserEvent): boolean}
@@ -32,6 +34,13 @@ ol.interaction.condition.altShiftKeysOnly = function(browserEvent) {
 };
 
 
+/**
+ * @param {goog.events.BrowserEvent} browserEvent Browser event.
+ * @return {boolean} True.
+ */
+ol.interaction.condition.always = goog.functions.TRUE;
+
+
 /**
  * @param {goog.events.BrowserEvent} browserEvent Browser event.
  * @return {boolean} True if only the no modifier keys are pressed.