diff --git a/linphone/coreapi/Makefile.am b/linphone/coreapi/Makefile.am
index f9cc2544d..467038d97 100644
--- a/linphone/coreapi/Makefile.am
+++ b/linphone/coreapi/Makefile.am
@@ -33,7 +33,8 @@ liblinphone_la_LDFLAGS= -version-info $(LIBLINPHONE_SO_VERSION) -no-undefined
 
 liblinphone_la_LIBADD= \
 		$(EXOSIP_LIBS) \
-		$(top_builddir)/mediastreamer2/src/libmediastreamer.la 
+		$(top_builddir)/mediastreamer2/src/libmediastreamer.la \
+		$(ORTP_LIBS)
 
 if BUILD_WIN32
 liblinphone_la_LIBADD+=$(top_builddir)/oRTP/src/libortp.la