diff --git a/bin/Makefile b/bin/Makefile
index b3385dcd32d9..3e7571c27e61 100644
--- a/bin/Makefile
+++ b/bin/Makefile
@@ -47,8 +47,6 @@ SUBDIR.${MK_TESTS}+=	tests
 
 .include <bsd.arch.inc.mk>
 
-SUBDIR:=	${SUBDIR:O}
-
 SUBDIR_PARALLEL=
 
 .include <bsd.subdir.mk>
diff --git a/sbin/Makefile b/sbin/Makefile
index 51e80bae8001..43f3cec7e03c 100644
--- a/sbin/Makefile
+++ b/sbin/Makefile
@@ -93,8 +93,6 @@ SUBDIR.${MK_TESTS}+=	tests
 
 .include <bsd.arch.inc.mk>
 
-SUBDIR:=	${SUBDIR:O}
-
 SUBDIR_PARALLEL=
 
 .include <bsd.subdir.mk>
diff --git a/usr.bin/Makefile b/usr.bin/Makefile
index 98f5a71f960c..c32ff16b5b02 100644
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -306,8 +306,6 @@ SUBDIR+=	mkesdb_static
 
 .include <bsd.arch.inc.mk>
 
-SUBDIR:=	${SUBDIR:O:u}
-
 SUBDIR_PARALLEL=
 
 .include <bsd.subdir.mk>
diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile
index 0aa63a8fb947..b1b5c5026678 100644
--- a/usr.sbin/Makefile
+++ b/usr.sbin/Makefile
@@ -218,8 +218,6 @@ SUBDIR.${MK_TESTS}+=	tests
 
 .include <bsd.arch.inc.mk>
 
-SUBDIR:=	${SUBDIR:O}
-
 SUBDIR_PARALLEL=
 
 .include <bsd.subdir.mk>