diff --git a/openbsc/tests/gbproxy/Makefile.am b/openbsc/tests/gbproxy/Makefile.am
index 5f5e582..f6dd785 100644
--- a/openbsc/tests/gbproxy/Makefile.am
+++ b/openbsc/tests/gbproxy/Makefile.am
@@ -10,6 +10,7 @@
 gbproxy_test_LDADD = \
 			$(top_builddir)/src/gprs/gb_proxy.o \
 			$(top_builddir)/src/gprs/gb_proxy_patch.o \
+			$(top_builddir)/src/gprs/gb_proxy_peer.o \
 			$(top_builddir)/src/gprs/gb_proxy_tlli.o \
 			$(top_builddir)/src/gprs/gprs_gb_parse.o \
 			$(top_builddir)/src/gprs/gprs_llc_parse.o \