diff --git a/tools/toolchain/Makefile b/tools/toolchain/Makefile
index 09bd97a6010a..78e08887b82f 100644
--- a/tools/toolchain/Makefile
+++ b/tools/toolchain/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.11 2001/11/13 15:30:06 tv Exp $
+#	$NetBSD: Makefile,v 1.12 2001/11/13 15:32:15 tv Exp $
 
 .include <bsd.own.mk>
 
@@ -24,5 +24,5 @@ INSTALL_TARGET+=install-gdb
 
 afterinstall: _mvcpp
 _mvcpp:
-	[ -f ${TOOLDIR}/bin/cpp ] && \
+	[ ! -f ${TOOLDIR}/bin/cpp ] || \
 		mv -f ${TOOLDIR}/bin/cpp ${TOOLDIR}/bin/${MACHINE_GNU_PLATFORM}-cpp