diff --git a/dsv4/kernels/router/dense_router_decode.py b/dsv4/kernels/router/dense_router_decode.py
index df840930..b9a6f80a 100644
--- a/dsv4/kernels/router/dense_router_decode.py
+++ b/dsv4/kernels/router/dense_router_decode.py
@@ -97,7 +97,8 @@ def dense_router_dispatch_nvfp4_fused(
     # Decode the gate_weight from NVFP4 to BF16 for cuBLAS
     from dsv4.ops.quantize import dequantize_nvfp4
     gate_bf16 = dequantize_nvfp4(gate_weight, gate_weight_scale, gate_ws2)
-    logits = torch.nn.functional.linear(hidden_states.float(), gate_bf16.T.float())
+    logits = torch.nn.functional.linear(hidden_states, gate_bf16.T)
+    logits = logits.float()  # BF16 → FP32 for numerical stability in sqrt(softplus)
 
     run_fused_activation_topk(
         logits, e_bias, routed_scaling_factor, top_k,