diff --git a/openbsc/src/gprs/Makefile.am b/openbsc/src/gprs/Makefile.am
index 3b58399..06c12d7 100644
--- a/openbsc/src/gprs/Makefile.am
+++ b/openbsc/src/gprs/Makefile.am
@@ -87,6 +87,7 @@
 	gprs_gsup_client.c \
 	sgsn_cdr.c \
 	sgsn_ares.c \
+	slhc.c \
 	oap.c \
 	oap_messages.c \
 	gprs_llc_xid.c \