diff --git a/modoboa/static/js/history.js b/modoboa/static/js/history.js
index 72cd2c069..d582219a1 100644
--- a/modoboa/static/js/history.js
+++ b/modoboa/static/js/history.js
@@ -179,7 +179,7 @@ History.prototype = {
     },
 
     getbaseurl: function() {
-        return this.base.substr(0, this.base.length - 1);
+        return decodeURIComponent(this.base.substr(0, this.base.length - 1));
     },
 
     delparam: function(name) {