diff --git a/more_math/NoiseMathNode.py b/more_math/NoiseMathNode.py
index 3d7d94a..ba753fe 100644
--- a/more_math/NoiseMathNode.py
+++ b/more_math/NoiseMathNode.py
@@ -73,8 +73,8 @@ class NoiseExecutor:
         else:
             self.tree = expr
         self.stack = stack
-
-    seed = -1
+        # Samplers seed their own noise (ancestral/SDE) from noise.seed, so pass the first input's seed through
+        self.seed = next((v.seed for v in V.values() if v is not None), 0)
 
     def generate_noise(self, input_latent: torch.Tensor) -> torch.Tensor:
         samples = input_latent["samples"]
diff --git a/more_math/deprecated/NoiseMathNode.py b/more_math/deprecated/NoiseMathNode.py
index 935ddc3..ddf674d 100644
--- a/more_math/deprecated/NoiseMathNode.py
+++ b/more_math/deprecated/NoiseMathNode.py
@@ -100,8 +100,7 @@ class NoiseExecutor:
         self.z = z
         self.expr = Noise
         self.tree = parse_expr(Noise)
-
-    seed = -1
+        self.seed = next((n.seed for n in (a, b, c, d) if n is not None), 0)
 
     def generate_noise(self, input_latent: torch.Tensor) -> torch.Tensor:
         samples = input_latent["samples"]
diff --git a/tests/test_more_math.py b/tests/test_more_math.py
index 3cbfbed..311a51c 100644
--- a/tests/test_more_math.py
+++ b/tests/test_more_math.py
@@ -360,6 +360,7 @@ def test_noise_math_5d():
     class MockNoise:
         def __init__(self, tensor):
             self.tensor = tensor
+            self.seed = 0
 
         def generate_noise(self, input_latent):
             return self.tensor
@@ -382,6 +383,7 @@ def test_noise_math_autogrow():
     class MockNoise:
         def __init__(self, tensor):
             self.tensor = tensor
+            self.seed = 0
 
         def generate_noise(self, input_latent):
             return self.tensor