diff --git a/lib/libdwarf/Makefile b/lib/libdwarf/Makefile
index e2bb5a5289e5..03f40cdd85ee 100644
--- a/lib/libdwarf/Makefile
+++ b/lib/libdwarf/Makefile
@@ -94,7 +94,7 @@ CLEANFILES=	${GENSRCS}
 CLEANDIRS=	sys
 CFLAGS+=	-I. -I${SRCDIR} -I${ELFTCDIR}/common -I${ELFTCDIR}/libelf
 
-sys/elf32.h sys/elf64.h sys/elf_common.h: ${.CURDIR}/../../sys/${.TARGET} .NOMETA
+sys/elf32.h sys/elf64.h sys/elf_common.h: ${SRCTOP}/sys/${.TARGET} .NOMETA
 	mkdir -p ${.OBJDIR}/sys
 	ln -sf ${.ALLSRC} ${.TARGET}