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-rw-r--r--tcpdump.1.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/tcpdump.1.in b/tcpdump.1.in
index 2de8daa4..f04a5793 100644
--- a/tcpdump.1.in
+++ b/tcpdump.1.in
@@ -400,7 +400,7 @@ If the
flag is supported, an interface number as printed by that flag can be
used as the
.I interface
-argument.
+argument, if no interface on the system has that number as a name.
.TP
.B \-I
.PD 0