diff --git a/bin/ls/ls.1 b/bin/ls/ls.1
index 8b7672b996c..d9e006bb84c 100644
--- a/bin/ls/ls.1
+++ b/bin/ls/ls.1
@@ -194,6 +194,8 @@ Use time when file status was last changed for sorting or printing.
 Directories are listed as plain files (not searched recursively).
 .It Fl f
 Output is not sorted.
+This option turns on
+.Fl a .
 .It Fl g
 This option is deprecated and is only available for compatibility
 with
diff --git a/bin/ls/ls.c b/bin/ls/ls.c
index be0903561f0..a46f358bd0c 100644
--- a/bin/ls/ls.c
+++ b/bin/ls/ls.c
@@ -226,6 +226,9 @@ main(int argc, char *argv[])
 			f_accesstime = 0;
 			f_statustime = 0;
 			break;
+		case 'f':
+			f_nosort = 1;
+		       /* FALLTHROUGH */
 		case 'a':
 			fts_options |= FTS_SEEDOT;
 			/* FALLTHROUGH */
@@ -300,9 +303,6 @@ main(int argc, char *argv[])
 			f_listdir = 1;
 			f_recursive = 0;
 			break;
-		case 'f':
-			f_nosort = 1;
-			break;
 		case 'g':	/* Compatibility with 4.3BSD. */
 			break;
 		case 'h':