diff --git a/tinygrad/uop/ops.py b/tinygrad/uop/ops.py
index 1ea85c5766..4826ddab2c 100644
--- a/tinygrad/uop/ops.py
+++ b/tinygrad/uop/ops.py
@@ -1422,6 +1422,7 @@ def bitcast(x, in_dtype:DType, out_dtype:DType):
 
 renderer = PatternMatcher([
   (UPat((Ops.DEFINE_VAR,), name="x"), lambda x: x.expr),
+  (UPat(Ops.PARAM, src=(UPat(), UPat(), UPat(), UPat(), UPat(Ops.NOOP, name="x"))), lambda x: x.arg),
   (UPat((Ops.SPECIAL), name="x"), lambda x: x.arg),
   (UPat(Ops.RANGE, name="x"), lambda x: f"r{range_str(x)}"),
   (UPat((Ops.CONST, Ops.VCONST), name="x"), lambda x: str(x.arg)),
diff --git a/tinygrad/viz/serve.py b/tinygrad/viz/serve.py
index 0e3cc801bb..4aac563d3b 100755
--- a/tinygrad/viz/serve.py
+++ b/tinygrad/viz/serve.py
@@ -128,6 +128,8 @@ def uop_to_json(x:UOp) -> dict[int, dict]:
         label += f"\n({multirange_str(rngs, color=True)})"
       if u._shape is not None:
         label += f"\n{shape_to_str(u.shape)}"
+      if u.op is Ops.CALL:
+        label += f"\n{u.src[0].key.hex()[:8]}"
       if u.op in {Ops.INDEX, Ops.BUFFERIZE}:
         if len(u.toposort()) < 30: label += f"\n{u.render()}"
         ranges: list[UOp] = []