diff --git a/man/mu-index.1 b/man/mu-index.1
index 880681e9..3e11a37a 100644
--- a/man/mu-index.1
+++ b/man/mu-index.1
@@ -110,7 +110,7 @@ set the maximum size (in bytes) for messages. The default maximum (currently
 at 50Mb) should be enough in most cases, but if you encounter warnings from
 \fBmu\fR about ignoring messsage because they are too big, you may want to
 increase this. Note that the reason for having a maximum size is that big
-message require big memory allocations, which may lead to problems.
+messages require big memory allocations, which may lead to problems.
 
 .B NOTE:
 It is not recommended to mix maildirs and sub-maildirs within the hierarchy