diff --git a/src/services/FileDirective.js b/src/services/FileDirective.js
index 545fa20..1dc9990 100644
--- a/src/services/FileDirective.js
+++ b/src/services/FileDirective.js
@@ -42,7 +42,8 @@ export default function __identity() {
          */
         unbind() {
             for(var key in this.events) {
-                this.element.unbind(key, this.events[key]);
+                var prop = this.events[key];
+                this.element.unbind(key, this[prop]);
             }
         }
         /**
@@ -75,4 +76,4 @@ export default function __identity() {
 
 
     return FileDirective;
-}
\ No newline at end of file
+}