diff --git a/sys/modules/vx/Makefile b/sys/modules/vx/Makefile
index 53a8472f9bd7..37d036f654a6 100644
--- a/sys/modules/vx/Makefile
+++ b/sys/modules/vx/Makefile
@@ -7,6 +7,6 @@ SRCS=	if_vx.c if_vx_pci.c
 .if ${MACHINE_ARCH} == "i386"
 SRCS+=	if_vx_eisa.c
 .endif
-SRCS+=	opt_bdg.h device_if.h bus_if.h pci_if.h
+SRCS+=	opt_bdg.h device_if.h bus_if.h pci_if.h eisa_if.h
 
 .include <bsd.kmod.mk>