diff --git a/tinygrad/codegen/linearizer.py b/tinygrad/codegen/linearizer.py
index 5932109b21..d3daa70c40 100644
--- a/tinygrad/codegen/linearizer.py
+++ b/tinygrad/codegen/linearizer.py
@@ -542,10 +542,9 @@ class Linearizer(Kernel):
       assert offs is None, "not available if we aren't doing reduce"
       return acc
     # MULACC fusion. TODO: this is copied from Interpreted
-    if x.op == ReduceOps.SUM and x.src[0].__class__ is LazyOp and x.src[0].op == BinaryOps.MUL:
-      x = LazyOp(TernaryOps.MULACC, x.src[0].src, x.arg)
-    if x.op == ReduceOps.SUM and x.src[0].__class__ is LazyOp and x.src[0].op == UnaryOps.CAST and x.src[0].src[0].__class__ is LazyOp and x.src[0].src[0].op == BinaryOps.MUL:  # noqa: E501
-      x = LazyOp(TernaryOps.MULACC, x.src[0].src[0].src, x.arg)
+    if x.op == ReduceOps.SUM:
+      if x.src[0].op == BinaryOps.MUL: x = LazyOp(TernaryOps.MULACC, x.src[0].src, x.arg)
+      if x.src[0].op == UnaryOps.CAST and x.src[0].src[0].op == BinaryOps.MUL: x = LazyOp(TernaryOps.MULACC, x.src[0].src[0].src, x.arg)
     values = [self.ast_parse(v, acc, offs, loaded_buffers, loop_ctx=loop_ctx, cache=cache) for v in x.src]
     ops = {ReduceOps.SUM:BinaryOps.ADD, ReduceOps.MAX:BinaryOps.MAX, TernaryOps.MULACC:TernaryOps.MULACC}
     if x.op in ops:
diff --git a/tinygrad/device.py b/tinygrad/device.py
index 0b87db53bf..d9f612ec54 100644
--- a/tinygrad/device.py
+++ b/tinygrad/device.py
@@ -213,8 +213,9 @@ def _get_interpreted_fxn(fxn_for_op:Dict[Op, Callable], ast:LazyOp) -> Interpret
   def _interpret_ast(ast:LazyOp) -> str:
     # TODO: shortcutted store won't work with strides
     if ast.op == BufferOps.STORE: return _interpret_ast(ast.src[0])
-    if TernaryOps.MULACC in fxn_for_op and ast.op == ReduceOps.SUM and isinstance(ast.src[0], LazyOp) and ast.src[0].op == BinaryOps.MUL:
-      ast = LazyOp(TernaryOps.MULACC, ast.src[0].src, ast.arg)
+    if TernaryOps.MULACC in fxn_for_op and ast.op == ReduceOps.SUM:
+      if ast.src[0].op == BinaryOps.MUL: ast = LazyOp(TernaryOps.MULACC, ast.src[0].src, ast.arg)
+      if ast.src[0].op == UnaryOps.CAST and ast.src[0].src[0].op == BinaryOps.MUL: ast = LazyOp(TernaryOps.MULACC, ast.src[0].src[0].src, ast.arg)
 
     if ast.op in BufferOps:
       if ast.op == ast.op == BufferOps.CONST: tmp = f"{gstr(fxn_for_op[ast.op], ast.op)}({gstr(ast.arg.val)}, {gstr(ast.arg.dtype)})"