diff --git a/arch/sim/src/Makefile b/arch/sim/src/Makefile
index 4f1b7a28d5..74bbe50f41 100644
--- a/arch/sim/src/Makefile
+++ b/arch/sim/src/Makefile
@@ -40,6 +40,9 @@ NUTTX = $(call CONVERT_PATH,$(TOPDIR)$(DELIM)nuttx$(EXEEXT))
 
 LINKOBJS = sim_head$(OBJEXT)
 REQUIREDOBJS = $(LINKOBJS) sim_doirq$(OBJEXT)
+ifeq ($(CONFIG_SIM_NETUSRSOCK),y)
+  REQUIREDOBJS += sim_usrsock$(OBJEXT)
+endif
 
 ifeq ($(CONFIG_HOST_X86_64),y)
 ifeq ($(CONFIG_SIM_M32),y)