diff --git a/sys/boot/common/Makefile.inc b/sys/boot/common/Makefile.inc
index b6c3acfbc21..bf76992f52a 100644
--- a/sys/boot/common/Makefile.inc
+++ b/sys/boot/common/Makefile.inc
@@ -1,9 +1,13 @@
 # $FreeBSD$
 
 SRCS+=	bcache.c boot.c commands.c console.c devopen.c interp.c 
-SRCS+=	interp_backslash.c interp_parse.c load_aout.c load_elf.c ls.c misc.c 
+SRCS+=	interp_backslash.c interp_parse.c load_elf.c ls.c misc.c 
 SRCS+=	module.c panic.c
 
+.if defined(LOADER_AOUT_SUPPORT)
+SRCS+=	load_aout.c
+.endif
+
 .if defined(LOADER_NET_SUPPORT)
 SRCS+=	dev_net.c
 .endif