diff --git a/fio.1 b/fio.1
index 7846e95732..1953aea118 100644
--- a/fio.1
+++ b/fio.1
@@ -2431,7 +2431,7 @@ The TCP or UDP port to bind to or connect to. If this is used with
 this will be the starting port number since fio will use a range of
 ports.
 .TP
-.BI (rdma)port
+.BI (rdma)port \fR=\fPint
 The port to use for RDMA-CM communication. This should be the same
 value on the client and the server side.
 .TP