diff --git a/targets/RTAI/USER/Makefile b/targets/RTAI/USER/Makefile
index fd0ee37bd6ad6eb3c721b45eaabc8a42c0bfb5a7..8c4ea4e50889e5b44597af91a713f437cda68d6f 100644
--- a/targets/RTAI/USER/Makefile
+++ b/targets/RTAI/USER/Makefile
@@ -77,6 +77,7 @@ ifeq ($(OPENAIR2),1)
 ASN1_MSG_OBJS1=$(addprefix $(OPENAIR2_DIR)/RRC/LITE/MESSAGES/, $(ASN1_MSG_OBJS))
 OBJ += $(L2_OBJS) $(LIST_OBJ) $(TIMER_OBJ) $(MEM_OBJ) $(OTG_OBJS) $(MATH_OBJS) 
 OBJ += $(OPENAIR1_DIR)/SIMULATION/ETH_TRANSPORT/netlink_init.o
+OBJ += $(PDCP_DIR)/pdcp_thread.o
 CFLAGS += -DOPENAIR2 -DNO_RRM -DPUCCH -DMAC_CONTEXT=1
 endif