diff --git a/contrib/tcpdump/tcpdump.1 b/contrib/tcpdump/tcpdump.1
index a7775ebe9c36..232bcf1db50a 100644
--- a/contrib/tcpdump/tcpdump.1
+++ b/contrib/tcpdump/tcpdump.1
@@ -646,7 +646,7 @@ ping packets):
 .RS
 .nf
 .B
-tcpdump 'icmp[0] != 8 and icmp[0] != 0"
+tcpdump 'icmp[0] != 8 and icmp[0] != 0'
 .fi
 .RE
 .SH OUTPUT FORMAT