diff --git a/dsv4/kernels/router/dense_router_decode.py b/dsv4/kernels/router/dense_router_decode.py
index dda5ae88..606a2f74 100644
--- a/dsv4/kernels/router/dense_router_decode.py
+++ b/dsv4/kernels/router/dense_router_decode.py
@@ -49,7 +49,7 @@ def _run_prefill_path(
     out_weights, out_ids,
 ):
     """GEMM via torch.nn.functional.linear, then fused activation + top-k."""
-    logits = torch.nn.functional.linear(hidden_states.float(), W_gate.float())
+    logits = torch.nn.functional.linear(hidden_states.float(), W_gate.T.float())
     from dsv4.kernels.router._activation_topk import run_fused_activation_topk
     run_fused_activation_topk(
         logits, e_bias, routed_scaling_factor, top_k,