diff --git a/man7/inotify.7 b/man7/inotify.7
index 7e5a5b4df..85c05a9bc 100644
--- a/man7/inotify.7
+++ b/man7/inotify.7
@@ -358,7 +358,12 @@ watch list.
 .BR IN_ONLYDIR " (since Linux 2.6.15)"
 Watch
 .I pathname
-only if it is a directory.
+only if it is a directory;
+the error
+.B ENOTDIR
+results if
+.I pathname
+is not a directory.
 Using this flag provides an application with a race-free way of
 ensuring that the monitored object is a directory.
 .RE