diff --git a/onnxruntime/core/providers/cpu/math/softmax_shared.cc b/onnxruntime/core/providers/cpu/math/softmax_shared.cc
index 8ee6ec79c2..7dd3a10cfc 100644
--- a/onnxruntime/core/providers/cpu/math/softmax_shared.cc
+++ b/onnxruntime/core/providers/cpu/math/softmax_shared.cc
@@ -25,6 +25,7 @@
 #pragma warning(disable : 4996)
 #endif
 #include <algorithm>
+#include <cmath>
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif
@@ -79,7 +80,7 @@ common::Status SoftmaxCPU(const int64_t N,
     }
   } else {
     for (int i = 0; i < N; ++i) {
-      auto log_fmaxf_scale_i = log(fmaxf(scale[i], 1e-20f));
+      auto log_fmaxf_scale_i = std::log(fmaxf(scale[i], 1e-20f));
       for (int j = 0; j < D; ++j) {
         Ydata[i * D + j] = Xdata[i * D + j] - rowmax[i] - log_fmaxf_scale_i;
       }
diff --git a/onnxruntime/core/providers/cpu/rnn/rnn_activation_functors.h b/onnxruntime/core/providers/cpu/rnn/rnn_activation_functors.h
index 8f2be9d1cf..f7724746dd 100644
--- a/onnxruntime/core/providers/cpu/rnn/rnn_activation_functors.h
+++ b/onnxruntime/core/providers/cpu/rnn/rnn_activation_functors.h
@@ -39,9 +39,8 @@ template <typename T>
 inline T Sigmoid(T x, T alpha RNN_UNUSED_PARAMETER, T beta RNN_UNUSED_PARAMETER) {
   if (x >= 0) {
     return 1 / (1 + exp(-x));
-  } else {
-    return exp(x) / (1 + exp(x));
   }
+  return exp(x) / (1 + exp(x));
 }
 
 template <typename T>
@@ -69,7 +68,7 @@ inline T Softsign(T x, T alpha, T beta);
 
 template <>
 inline float Softsign<float>(float x, float alpha ORT_ATTRIBUTE_UNUSED, float beta ORT_ATTRIBUTE_UNUSED) {
-  return x / (1 + fabs(x));
+  return x / (1 + std::fabs(x));
 }
 
 template <>