diff -r ba06562a06a2 -r ebe488e04ca3 mercurial/extensions.py
--- a/mercurial/extensions.py	Tue Aug 30 15:16:28 2016 -0700
+++ b/mercurial/extensions.py	Fri Sep 30 00:25:15 2016 +0200
@@ -105,7 +105,7 @@
         try:
             mod = _importh("hgext.%s" % name)
         except ImportError as err:
-            _reportimporterror(ui, err, "hgext.%s" % name, name)
+            _reportimporterror(ui, err, "hgext.%s" % name, "hgext3rd.%s" % name)
             try:
                 mod = _importh("hgext3rd.%s" % name)
             except ImportError as err: