diff --git a/man7/tcp.7 b/man7/tcp.7
index ece30f5e7..4c252094a 100644
--- a/man7/tcp.7
+++ b/man7/tcp.7
@@ -551,7 +551,11 @@ is a sufficient amount to send out, thereby avoiding the
 frequent sending of small packets, which results in poor
 utilization of the network.
 This option is overriden by
-.BR TCP_CORK . 
+.BR TCP_CORK ; 
+however, setting this option forces an explicit flush of
+pending output, even if
+.B TCP_CORK
+is currently set.
 .TP
 .B TCP_QUICKACK
 Enable quickack mode if set or disable quickack