diff --git a/dsv4/kernels/router/nvfp4_fused_router_kernel.py b/dsv4/kernels/router/nvfp4_fused_router_kernel.py
index cb22ab06..d59caeb7 100644
--- a/dsv4/kernels/router/nvfp4_fused_router_kernel.py
+++ b/dsv4/kernels/router/nvfp4_fused_router_kernel.py
@@ -148,7 +148,7 @@ class Nvfp4FusedRouterKernel:
 
         # Stage counts (same as MoE)
         self.num_acc_stage, self.num_ab_stage, self.num_c_stage = self._compute_stages(
-            tiled_mma, self.mma_tiler, a_dtype, b_dtype,
+            tiled_mma, self.mma_tiler_mnk, a_dtype, b_dtype,
             self.epi_tile, c_dtype, c_layout, sf_dtype, self.sf_vec_size,
             self.smem_capacity, self.occupancy)