diff --git a/build.symbian/pjsip.mmp b/build.symbian/pjsip.mmp
index efaf9bd..513a7de 100644
--- a/build.symbian/pjsip.mmp
+++ b/build.symbian/pjsip.mmp
@@ -32,6 +32,7 @@
 
 // PJSIP-CORE files
 
+//SOURCE	sip_auth_aka.c
 SOURCE	sip_auth_client.c
 SOURCE	sip_auth_msg.c
 SOURCE	sip_auth_parser.c