diff --git a/man4/loop.4 b/man4/loop.4
index 1f8a31ac7..786eb0868 100644
--- a/man4/loop.4
+++ b/man4/loop.4
@@ -133,7 +133,7 @@ Allow automatic partition scanning.
 .TP
 .BR LO_FLAGS_DIRECT_IO " (since Linux 4.10)"
 .\" commit 2e5ab5f379f96a6207c45be40c357ebb1beb8ef3
-Use direct io mode to access backing file.
+Use direct I/O mode to access the backing file.
 .RE
 .TP
 .B LOOP_GET_STATUS