diff --git a/hgext/fix.py b/hgext/fix.py
--- a/hgext/fix.py
+++ b/hgext/fix.py
@@ -439,7 +439,7 @@
         raise error.Abort(b'unresolved conflicts', hint=b"use 'hg resolve'")
     if not revs:
         raise error.Abort(
-            b'no changesets specified', hint=b'use --rev or --working-dir'
+            b'no changesets specified', hint=b'use --source or --working-dir'
         )
     return revs
 
diff --git a/tests/test-fix.t b/tests/test-fix.t
--- a/tests/test-fix.t
+++ b/tests/test-fix.t
@@ -246,15 +246,15 @@
 
   $ hg fix
   abort: no changesets specified
-  (use --rev or --working-dir)
+  (use --source or --working-dir)
   [255]
   $ hg fix --whole
   abort: no changesets specified
-  (use --rev or --working-dir)
+  (use --source or --working-dir)
   [255]
   $ hg fix --base 0
   abort: no changesets specified
-  (use --rev or --working-dir)
+  (use --source or --working-dir)
   [255]
 
 Fixing a public revision isn't allowed. It should abort early enough that