diff --git a/network_process/interface/fwd_types.hpp b/network_process/interface/fwd_types.hpp
index ce04a2c..949ac11 100644
--- a/network_process/interface/fwd_types.hpp
+++ b/network_process/interface/fwd_types.hpp
@@ -267,7 +267,12 @@ template <size_t N>
 struct equal_to<pod_key_t<N>> {
     bool operator()(const pod_key_t<N>& k1, const pod_key_t<N>& k2) const
     {
-        return static_cast<std::array<uint32_t, N>>(k1) == static_cast<std::array<uint32_t, N>>(k2);
+        std::array<uint32_t, N> a, b;
+        for (size_t i = 0; i < N; ++i) {
+            a[i] = static_cast<uint32_t>(k1[i]);
+            b[i] = static_cast<uint32_t>(k2[i]);
+        }
+        return a == b;
     }
 };
 } // namespace std
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