diff --git a/pandas/core/computation/pytables.py b/pandas/core/computation/pytables.py
index 001eb178..cc9baf88 100644
--- a/pandas/core/computation/pytables.py
+++ b/pandas/core/computation/pytables.py
@@ -425,6 +425,10 @@ def visit_Subscript(self, node, **kwargs):
             value = value.value
         except AttributeError:
             pass
+        try:
+            slobj = slobj.value
+        except AttributeError:
+            pass
 
         try:
             return self.const_type(value[slobj], self.env)