diff --git a/mailnews/addrbook/src/nsAddrBookSession.cpp b/mailnews/addrbook/src/nsAddrBookSession.cpp
index c096ba782cf6..f72cc9c2cda1 100644
--- a/mailnews/addrbook/src/nsAddrBookSession.cpp
+++ b/mailnews/addrbook/src/nsAddrBookSession.cpp
@@ -278,4 +278,6 @@ NS_IMETHODIMP nsAddrBookSession::GeneratePhoneticNameFromCard(nsIAbCard *aCard,
     *aName = ToNewUnicode(lastName + firstName);
   else
     *aName = ToNewUnicode(firstName + lastName);
+
+  return *aName ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }