diff --git a/gnu/usr.bin/cvs/contrib/Makefile b/gnu/usr.bin/cvs/contrib/Makefile
index 41e30122b55d..5a8a8b5215fd 100644
--- a/gnu/usr.bin/cvs/contrib/Makefile
+++ b/gnu/usr.bin/cvs/contrib/Makefile
@@ -1,7 +1,5 @@
 # $FreeBSD$
 
-.POSIX:
-
 .include "../Makefile.inc"
 
 .PATH:	${CVSDIR}/contrib
@@ -21,6 +19,10 @@ CLEANFILES+=	$(SCRIPTS)
 
 .SUFFIXES: .sh .pl .in
 
+# Prevent Makefile.in from overwriting Makefile through the suffix rules.
+Makefile:
+	@:
+
 .sh:
 	cp ${.IMPSRC} ${.TARGET}