diff --git a/pymbolic/interop/common.py b/pymbolic/interop/common.py
index 23ea2ea28cf88209fa5fa813d31728f9778b0297..91960ba960a0448b355a3d29b6fc75bb2e4a7511 100644
--- a/pymbolic/interop/common.py
+++ b/pymbolic/interop/common.py
@@ -112,7 +112,7 @@ class SympyLikeToPymbolicMapper(SympyLikeMapperBase):
                 self.rec(expr.args[0]), expr.prefix)
 
     def map_UnevaluatedExpr(self, expr):  # noqa
-        return self.rec(expr.args[0])
+        return prim.CommonSubexpression(self.rec(expr.args[0]), None)
 
     def not_supported(self, expr):  # noqa
         if isinstance(expr, int):