diff --git a/man2/mmap.2 b/man2/mmap.2
index e6f96b471..1bb6acae9 100644
--- a/man2/mmap.2
+++ b/man2/mmap.2
@@ -118,8 +118,9 @@ of the following values in
 .TP
 .B MAP_SHARED
 Share this mapping.
-Updates to the mapping are visible to other processes that map this file,
-and are carried through to the underlying file.
+Updates to the mapping are visible to other processes mapping the same region,
+and (in the case of file-backed mappings)
+are carried through to the underlying file.
 (To precisely control when updates are carried through
 to the underlying file requires the use of
 .BR msync (2).)