diff --git a/dev/cuda/matmul_forward.cu b/dev/cuda/matmul_forward.cu
index b4794903a..ec13805a3 100644
--- a/dev/cuda/matmul_forward.cu
+++ b/dev/cuda/matmul_forward.cu
@@ -72,11 +72,9 @@ __global__ void matmul_forward_kernel1(float* out,
     int bt = blockIdx.x * blockDim.x + threadIdx.x;
     int oc = blockIdx.y * blockDim.y + threadIdx.y;
     if (bt < BT && oc < OC) {
-        int b = bt / BT;
-        int t = bt % BT;
         float val = (bias != NULL) ? bias[oc] : 0.0f;
-        const float* wrow = weight + oc*C;
-        const float* inp_bt = inp + b * BT * C + t * C;
+        const float* wrow = weight + oc * C;
+        const float* inp_bt = inp + bt * C;
         for (int i = 0; i < C; i++) {
             val += inp_bt[i] * wrow[i];
         }