diff --git a/mozilla/mailnews/base/src/nsMsgAccount.cpp b/mozilla/mailnews/base/src/nsMsgAccount.cpp
index 525e9cc75b9..743fb944e8e 100644
--- a/mozilla/mailnews/base/src/nsMsgAccount.cpp
+++ b/mozilla/mailnews/base/src/nsMsgAccount.cpp
@@ -475,6 +475,7 @@ nsMsgAccount::ClearAllValues()
     nsresult rv;
     nsCAutoString rootPref("mail.account.");
     rootPref += m_accountKey;
+    rootPref += '.';
 
     rv = getPrefService();
     if (NS_FAILED(rv))
diff --git a/mozilla/mailnews/base/util/nsMsgIdentity.cpp b/mozilla/mailnews/base/util/nsMsgIdentity.cpp
index 55526d6087d..05ea8d47026 100644
--- a/mozilla/mailnews/base/util/nsMsgIdentity.cpp
+++ b/mozilla/mailnews/base/util/nsMsgIdentity.cpp
@@ -436,6 +436,7 @@ nsMsgIdentity::ClearAllValues()
 
     nsCAutoString rootPref("mail.identity.");
     rootPref += m_identityKey;
+    rootPref += '.';
 
     PRUint32 childCount;
     char**   childArray;
diff --git a/mozilla/mailnews/base/util/nsMsgIncomingServer.cpp b/mozilla/mailnews/base/util/nsMsgIncomingServer.cpp
index f19345dc18d..64f1bcd7833 100644
--- a/mozilla/mailnews/base/util/nsMsgIncomingServer.cpp
+++ b/mozilla/mailnews/base/util/nsMsgIncomingServer.cpp
@@ -1127,6 +1127,7 @@ nsMsgIncomingServer::ClearAllValues()
 {
     nsCAutoString rootPref("mail.server.");
     rootPref += m_serverKey;
+    rootPref += '.';
 
     PRUint32 childCount;
     char**   childArray;