diff --git a/sys/boot/libsa/Makefile b/sys/boot/libsa/Makefile
index cdd4a86a5ad..b870443e7fc 100644
--- a/sys/boot/libsa/Makefile
+++ b/sys/boot/libsa/Makefile
@@ -21,7 +21,7 @@ LIB?=		sa
 NO_PIC=
 WARNS?=		0
 
-CFLAGS+= -I${SASRC}
+CFLAGS+= -I${SASRC} -I${SYSDIR}
 
 # standalone components and stuff we have modified locally
 SRCS+=	gzguts.h zutil.h __main.c assert.c bcd.c environment.c getopt.c gets.c \