diff --git a/Lib/lib2to3/fixes/fix_import.py b/Lib/lib2to3/fixes/fix_import.py
index 201e811..88e9d10 100644
--- a/Lib/lib2to3/fixes/fix_import.py
+++ b/Lib/lib2to3/fixes/fix_import.py
@@ -32,7 +32,7 @@
         elif node.type == syms.dotted_as_names:
             pending.extend(node.children[::-2])
         else:
-            raise AssertionError("unkown node type")
+            raise AssertionError("unknown node type")
 
 
 class FixImport(fixer_base.BaseFix):