diff --git a/build.symbian/pjsip_simple.mmp b/build.symbian/pjsip_simple.mmp
index fafbf85..86822c6 100644
--- a/build.symbian/pjsip_simple.mmp
+++ b/build.symbian/pjsip_simple.mmp
@@ -41,6 +41,7 @@
 SOURCE	presence.c
 SOURCE	presence_body.c
 SOURCE	publishc.c
+SOURCE	rpid.c
 SOURCE	xpidf.c
 
 SYSTEMINCLUDE	..\pjlib\include