diff --git a/src/mod/endpoints/mod_sofia/mod_sofia.2008.vcproj b/src/mod/endpoints/mod_sofia/mod_sofia.2008.vcproj
index 733d3bdcd9..7ad10b804d 100644
--- a/src/mod/endpoints/mod_sofia/mod_sofia.2008.vcproj
+++ b/src/mod/endpoints/mod_sofia/mod_sofia.2008.vcproj
@@ -301,6 +301,10 @@
 			RelativePath=".\mod_sofia.h"
 			>
 		</File>
+		<File
+			RelativePath=".\rtp.c"
+			>
+		</File>
 		<File
 			RelativePath=".\sip-dig.c"
 			>