diff --git a/man/mdeliver.1 b/man/mdeliver.1
index 20f9faa..a7a67b0 100644
--- a/man/mdeliver.1
+++ b/man/mdeliver.1
@@ -53,7 +53,7 @@ on the messages.
 The options are as follows:
 .Bl -tag -width Ds
 .It Fl M
-Deliver each message of a mbox.
+Deliver each message of an mbox.
 .It Fl c
 Deliver messages into
 .Pa cur/ ,