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-rw-r--r--sbin/ping/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/sbin/ping/Makefile b/sbin/ping/Makefile
index dcba2d18e0fd..f70e3bcda523 100644
--- a/sbin/ping/Makefile
+++ b/sbin/ping/Makefile
@@ -4,7 +4,7 @@
PROG= ping
MAN8= ping.8
BINMODE=4555
-COPTS+= -Wall
+COPTS+= -Wall -Wmissing-prototypes
.if ${MACHINE_ARCH} == "alpha"
COPTS+= -fno-builtin # GCC's builtin memcpy doesn't do unaligned copies
.endif