diff --git a/tinygrad/codegen/kernel.py b/tinygrad/codegen/kernel.py
index 4428a71e0a..42ea349a58 100644
--- a/tinygrad/codegen/kernel.py
+++ b/tinygrad/codegen/kernel.py
@@ -63,9 +63,7 @@ class Kernel:
       print(self.ast)
       raise e
 
-    @functools.lru_cache(None)
-    def ordered_parents(op:UOp) -> List[UOp]: return dedup([item for x in op.src for item in ordered_parents(x)] + [op])
-    self.reduceops = dedup([x for x in ordered_parents(self.ast) if x.op is Ops.REDUCE_AXIS])
+    self.reduceops = [x for x in self.ast.toposort if x.op is Ops.REDUCE_AXIS]
 
     self.vars: List[Variable] = self.ast.variables()
     # NOTE: this requires a specific order with the [::-1], this is likely a bug