diff --git a/gnu/usr.bin/cc/cc_drv/Makefile b/gnu/usr.bin/cc/cc_drv/Makefile
index 328944bd7d5..c486443dedb 100644
--- a/gnu/usr.bin/cc/cc_drv/Makefile
+++ b/gnu/usr.bin/cc/cc_drv/Makefile
@@ -5,9 +5,6 @@
 .PATH: ../cc_tools ${GCCDIR}
 
 SRCS=	multilib.h choose-temp.c obstack.c prefix.c pexecute.c version.c
-.if ${OSVERSION} < 400004
-SRCS+=	mkstemp.c
-.endif
 
 CFLAGS+=	-DPREFIX=\"/usr\"
 CFLAGS+=	-DIN_GCC