diff --git a/lib/astunparse/unparser.py b/lib/astunparse/unparser.py
index 767412c..15a19b9 100644
--- a/lib/astunparse/unparser.py
+++ b/lib/astunparse/unparser.py
@@ -642,10 +642,10 @@ def _Compare(self, t):
             self.dispatch(e)
         self.write(")")
 
-    boolops = {ast.And: 'and', ast.Or: 'or'}
+    boolops = {'And': 'and', 'Or': 'or'}
     def _BoolOp(self, t):
         self.write("(")
-        s = " %s " % self.boolops[t.op.__class__]
+        s = " %s " % self.boolops[t.op.__class__.__name__]
         interleave(lambda: self.write(s), self.dispatch, t.values)
         self.write(")")