diff --git a/kotlin-native/runtime/src/main/cpp/polyhash/arm.cpp b/kotlin-native/runtime/src/main/cpp/polyhash/arm.cpp
index 1e194af701f..a31474a60a7 100644
--- a/kotlin-native/runtime/src/main/cpp/polyhash/arm.cpp
+++ b/kotlin-native/runtime/src/main/cpp/polyhash/arm.cpp
@@ -99,7 +99,7 @@ int polyHash_arm(int length, uint16_t const* str) {
         // Vectorization is not supported.
         return polyHash_naive(length, str);
     }
-    int res;
+    uint32_t res;
     if (length < 488)
         res = NeonTraits::polyHashUnalignedUnrollUpTo16(length / 4, str);
     else
diff --git a/kotlin-native/runtime/src/main/cpp/polyhash/naive.h b/kotlin-native/runtime/src/main/cpp/polyhash/naive.h
index 20ca0a85052..762763c0dbd 100644
--- a/kotlin-native/runtime/src/main/cpp/polyhash/naive.h
+++ b/kotlin-native/runtime/src/main/cpp/polyhash/naive.h
@@ -9,7 +9,7 @@
 #include <cstdint>
 
 inline int polyHash_naive(int length, uint16_t const* str) {
-    int res = 0;
+    uint32_t res = 0;
     for (int i = 0; i < length; ++i)
         res = res * 31 + str[i];
     return res;
diff --git a/kotlin-native/runtime/src/main/cpp/polyhash/x86.cpp b/kotlin-native/runtime/src/main/cpp/polyhash/x86.cpp
index a5b2b321637..406a33fccb9 100644
--- a/kotlin-native/runtime/src/main/cpp/polyhash/x86.cpp
+++ b/kotlin-native/runtime/src/main/cpp/polyhash/x86.cpp
@@ -143,7 +143,7 @@ int polyHash_x86(int length, uint16_t const* str) {
         // Either vectorization is not supported or the string is too short to gain from it.
         return polyHash_naive(length, str);
     }
-    int res;
+    uint32_t res;
     if (length < 32)
         res = SSETraits::polyHashUnalignedUnrollUpTo8(length / 4, str);
     else if (!avx2Supported)