diff --git a/lib/ipc/Makefile.am b/lib/ipc/Makefile.am
index 691517561..04ff21374 100644
--- a/lib/ipc/Makefile.am
+++ b/lib/ipc/Makefile.am
@@ -23,6 +23,10 @@ libheim_ipcc_la_LIBADD = \
 	$(LIB_roken) \
 	$(PTHREAD_LIBADD)
 
+if SUNOS
+libheim_ipcc_la_LIBADD += -lsocket
+endif
+
 libheim_ipcs_la_LIBADD = $(libheim_ipcc_la_LIBADD)
 
 TESTS =	$(check_PROGRAMS)