diff --git a/sys/modules/em/Makefile b/sys/modules/em/Makefile
index 0d3942dc7f0..92aa093f986 100644
--- a/sys/modules/em/Makefile
+++ b/sys/modules/em/Makefile
@@ -4,7 +4,7 @@
 .PATH:  ${SRCTOP}/sys/dev/e1000
 KMOD    = if_em
 SRCS    = device_if.h bus_if.h pci_if.h opt_ddb.h opt_inet.h \
-	  opt_inet6.h ifdi_if.h
+	  opt_inet6.h opt_rss.h ifdi_if.h
 SRCS    += $(CORE_SRC) $(LEGACY_SRC)
 SRCS	+= $(COMMON_SHARED) $(LEGACY_SHARED) $(PCIE_SHARED)
 CORE_SRC = if_em.c em_txrx.c e1000_osdep.c