diff --git a/loopy/target/python.py b/loopy/target/python.py
index ddfd1e81cddacd941b6133eac973c82ddecc923e..11951abcf17e94c0fdba51042e3060735215b423 100644
--- a/loopy/target/python.py
+++ b/loopy/target/python.py
@@ -259,7 +259,7 @@ class PythonASTBuilderBase(ASTBuilderBase):
             lbound, ubound, inner):
         ecm = codegen_state.expression_to_code_mapper
 
-        from pymbolic.mapper.stringifier import PREC_NONE
+        from pymbolic.mapper.stringifier import PREC_NONE, PREC_SUM
         from genpy import For
 
         return For(