diff --git a/pandas/computation/expr.py b/pandas/computation/expr.py
index 7ebffef7368a0..ed4195b691815 100644
--- a/pandas/computation/expr.py
+++ b/pandas/computation/expr.py
@@ -548,6 +548,9 @@ def visit_UnaryOp(self, node, **kwargs):
     def visit_Name(self, node, **kwargs):
         return self.term_type(node.id, self.env, **kwargs)
 
+    def visit_NameConstant(self, node, **kwargs):
+        return self.const_type(node.value, self.env)
+
     def visit_Num(self, node, **kwargs):
         return self.const_type(node.n, self.env)