diff --git a/S1/hli28146_#88/PATS_cuda.py b/S1/hli28146_#88/PATS_cuda.py
index 91335419..a0d1411f 100644
--- a/S1/hli28146_#88/PATS_cuda.py
+++ b/S1/hli28146_#88/PATS_cuda.py
@@ -22,7 +22,7 @@ struct __align__(16) Float4 {
 
 // PATS Logic
 __device__ __forceinline__ float compute_pats(float x, float k_pi) {
-    float sig = 1.0f / (1.0f + __expf(-x));
+    float sig = 1.0f / (1.0f + expf(-x));
     return x * atanf(k_pi * sig);
 }
 
@@ -91,7 +91,7 @@ pats_op_module = load_inline(
     cuda_sources=cuda_source,
     functions=['pats_cuda_forward'],
     verbose=False,
-    extra_cuda_cflags=['-O3', '--use_fast_math']
+    extra_cuda_cflags=['-O3']
 )
 
 class ModelNew(nn.Module):