diff --git a/ChangeLog b/ChangeLog
index 5f0c22b491..8a61e7353c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -20,6 +20,7 @@ phpMyAdmin - ChangeLog
 - issue #11633 CodeMirror tooltip shows below modal window
 - issue #11639 Bug with the MainBackground Color
 - issue        Profiling checkbox is missing
+- issue #11642 Properly handle session expiry after POST requests
 
 4.5.1.0 (2015-10-23)
 - issue        Invalid argument supplied for foreach()
diff --git a/js/ajax.js b/js/ajax.js
index 3800c0d1b4..d047173ea9 100644
--- a/js/ajax.js
+++ b/js/ajax.js
@@ -490,7 +490,11 @@ var AJAX = {
             AJAX.xhr = null;
             if (parseInt(data.redirect_flag) == 1) {
                 // add one more GET param to display session expiry msg
-                window.location.href += '&session_expired=1';
+                if (window.location.href.indexOf('?') === -1) {
+                    window.location.href += '?session_expired=1';
+                } else {
+                    window.location.href += '&session_expired=1';
+                }
                 window.location.reload();
             } else if (parseInt(data.reload_flag) == 1) {
                 // remove the token param and reload
diff --git a/js/navigation.js b/js/navigation.js
index d1b6872ce4..f406734d22 100644
--- a/js/navigation.js
+++ b/js/navigation.js
@@ -78,7 +78,11 @@ function loadChildNodes(isNode, $expandElem, callback) {
                 callback(data);
             }
         } else if(data.redirect_flag == "1") {
-            window.location.href += '&session_expired=1';
+            if (window.location.href.indexOf('?') === -1) {
+                window.location.href += '?session_expired=1';
+            } else {
+                window.location.href += '&session_expired=1';
+            }
             window.location.reload();
         } else {
             var $throbber = $expandElem.find('img.throbber');