diff --git a/lib/libdwarf/Makefile b/lib/libdwarf/Makefile
index 2d5e01d85542..5366733c4c1d 100644
--- a/lib/libdwarf/Makefile
+++ b/lib/libdwarf/Makefile
@@ -74,7 +74,6 @@ SRCS=	\
 	libdwarf_str.c
 
 INCS=		dwarf.h libdwarf.h
-INCSDIR=	/usr/include
 
 GENSRCS=	dwarf_pubnames.c dwarf_pubtypes.c dwarf_weaks.c \
 		dwarf_funcs.c dwarf_vars.c dwarf_types.c	\
diff --git a/lib/libelf/Makefile b/lib/libelf/Makefile
index e6bf24a9ceb9..f1200920d958 100644
--- a/lib/libelf/Makefile
+++ b/lib/libelf/Makefile
@@ -64,7 +64,6 @@ SRCS=	elf.c							\
 	${GENSRCS}
 
 INCS=		libelf.h gelf.h
-INCSDIR=	/usr/include
 
 GENSRCS=	libelf_fsize.c libelf_msize.c libelf_convert.c
 CLEANFILES=	${GENSRCS}