diff --git a/openbsc/src/osmo-bsc_mgcp/Makefile.am b/openbsc/src/osmo-bsc_mgcp/Makefile.am
index 166e83d..3f58d5d 100644
--- a/openbsc/src/osmo-bsc_mgcp/Makefile.am
+++ b/openbsc/src/osmo-bsc_mgcp/Makefile.am
@@ -6,5 +6,5 @@
 
 osmo_bsc_mgcp_SOURCES = mgcp_main.c
 osmo_bsc_mgcp_LDADD = $(top_builddir)/src/libcommon/libcommon.a \
-		 $(top_builddir)/src/libmgcp/libmgcp.a \
+		 $(top_builddir)/src/libmgcp/libmgcp.a -lrt \
 		 $(LIBOSMOVTY_LIBS) $(LIBOSMOCORE_LIBS)