diff --git a/share/examples/kld/cdev/test/Makefile b/share/examples/kld/cdev/test/Makefile
index 17911ee4871..ad0c0fcd08d 100644
--- a/share/examples/kld/cdev/test/Makefile
+++ b/share/examples/kld/cdev/test/Makefile
@@ -68,7 +68,7 @@
 #
 PROG=	testcdev
 NO_MAN=
-WARNS=	5
+WARNS?=	5
 
 MODSTAT= /sbin/kldstat
 
diff --git a/share/examples/kld/syscall/test/Makefile b/share/examples/kld/syscall/test/Makefile
index b1c4f729b0a..09d535bf686 100644
--- a/share/examples/kld/syscall/test/Makefile
+++ b/share/examples/kld/syscall/test/Makefile
@@ -3,6 +3,6 @@
 
 PROG=	call
 NO_MAN=
-WARNS+=	5
+WARNS?=	5
 
 .include <bsd.prog.mk>