diff --git a/mail/base/content/messageWindow.js b/mail/base/content/messageWindow.js
index 421069c5fdcf..36972fc7e95d 100644
--- a/mail/base/content/messageWindow.js
+++ b/mail/base/content/messageWindow.js
@@ -551,6 +551,11 @@ function GetLoadedMsgFolder()
     return null;
 }
 
+function GetSelectedFolderURI()
+{
+  return gCurrentFolderUri;
+}
+
 function GetLoadedMessage()
 {
   return gCurrentMessageUri;
diff --git a/mailnews/base/resources/content/messageWindow.js b/mailnews/base/resources/content/messageWindow.js
index ef61614b12ce..d2c2125a3264 100644
--- a/mailnews/base/resources/content/messageWindow.js
+++ b/mailnews/base/resources/content/messageWindow.js
@@ -546,6 +546,11 @@ function GetLoadedMsgFolder()
     return null;
 }
 
+function GetSelectedFolderURI()
+{
+  return gCurrentFolderUri;
+}
+
 function GetLoadedMessage()
 {
   return gCurrentMessageUri;