diff --git a/Lib/imp.py b/Lib/imp.py
index 40869f5..34b6c54 100644
--- a/Lib/imp.py
+++ b/Lib/imp.py
@@ -267,7 +267,7 @@
         parent_name = name.rpartition('.')[0]
         if parent_name and parent_name not in sys.modules:
             msg = "parent {!r} not in sys.modules"
-            raise ImportError(msg.format(parentname), name=parent_name)
+            raise ImportError(msg.format(parent_name), name=parent_name)
         return module.__loader__.load_module(name)
     finally:
         try:
diff --git a/Lib/test/test_imp.py b/Lib/test/test_imp.py
index fe436f3..ade3e25 100644
--- a/Lib/test/test_imp.py
+++ b/Lib/test/test_imp.py
@@ -275,6 +275,15 @@
             import marshal
             imp.reload(marshal)
 
+    def test_with_deleted_parent(self):
+        # see #18681
+        from html import parser
+        del sys.modules['html']
+        def cleanup(): del sys.modules['html.parser']
+        self.addCleanup(cleanup)
+        with self.assertRaisesRegex(ImportError, 'html'):
+            imp.reload(parser)
+
 
 class PEP3147Tests(unittest.TestCase):
     """Tests of PEP 3147."""