diff --git a/dsv4/layers/moe.py b/dsv4/layers/moe.py
index 82b6ac58..6d7bf149 100644
--- a/dsv4/layers/moe.py
+++ b/dsv4/layers/moe.py
@@ -104,6 +104,10 @@ class Nvfp4MoE:
         """Set the swiglu_limit for activation clamping."""
         self._swiglu_limit = limit
 
+    def set_fused_swiglu(self, enabled: bool):
+        """Enable fused L1 GEMM + SwiGLU kernel (saves 240+ BF16 kernel launches per token)."""
+        self._fused_swiglu = enabled
+
     def _fill_token_indices(self):
         """Fill _token_indices with [0,0,..0, 1,1,..1, ...] (each token repeated top_k times).