diff --git a/include/v8-internal.h b/include/v8-internal.h
index ee3633826eb6..e4d698e6ce7e 100644
--- a/include/v8-internal.h
+++ b/include/v8-internal.h
@@ -308,9 +308,9 @@ class Internals {
   V8_INLINE static internal::Address ReadTaggedPointerField(
       internal::Address heap_object_ptr, int offset) {
 #ifdef V8_COMPRESS_POINTERS
-    int32_t value = ReadRawField<int32_t>(heap_object_ptr, offset);
+    uint32_t value = ReadRawField<uint32_t>(heap_object_ptr, offset);
     internal::Address root = GetRootFromOnHeapAddress(heap_object_ptr);
-    return root + static_cast<internal::Address>(static_cast<intptr_t>(value));
+    return root + static_cast<internal::Address>(static_cast<uintptr_t>(value));
 #else
     return ReadRawField<internal::Address>(heap_object_ptr, offset);
 #endif
@@ -319,8 +319,8 @@ class Internals {
   V8_INLINE static internal::Address ReadTaggedSignedField(
       internal::Address heap_object_ptr, int offset) {
 #ifdef V8_COMPRESS_POINTERS
-    int32_t value = ReadRawField<int32_t>(heap_object_ptr, offset);
-    return static_cast<internal::Address>(static_cast<intptr_t>(value));
+    uint32_t value = ReadRawField<uint32_t>(heap_object_ptr, offset);
+    return static_cast<internal::Address>(static_cast<uintptr_t>(value));
 #else
     return ReadRawField<internal::Address>(heap_object_ptr, offset);
 #endif
@@ -337,13 +337,9 @@ class Internals {
   }
 
   V8_INLINE static internal::Address DecompressTaggedAnyField(
-      internal::Address heap_object_ptr, int32_t value) {
-    internal::Address root_mask = static_cast<internal::Address>(
-        -static_cast<intptr_t>(value & kSmiTagMask));
-    internal::Address root_or_zero =
-        root_mask & GetRootFromOnHeapAddress(heap_object_ptr);
-    return root_or_zero +
-           static_cast<internal::Address>(static_cast<intptr_t>(value));
+      internal::Address heap_object_ptr, uint32_t value) {
+    internal::Address root = GetRootFromOnHeapAddress(heap_object_ptr);
+    return root + static_cast<internal::Address>(static_cast<uintptr_t>(value));
   }
 #endif  // V8_COMPRESS_POINTERS
 };
diff --git a/include/v8.h b/include/v8.h
index c967f42c3ff0..caae20abef88 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -11064,7 +11064,7 @@ Local<Value> Object::GetInternalField(int index) {
 #ifdef V8_COMPRESS_POINTERS
     // We read the full pointer value and then decompress it in order to avoid
     // dealing with potential endiannes issues.
-    value = I::DecompressTaggedAnyField(obj, static_cast<int32_t>(value));
+    value = I::DecompressTaggedAnyField(obj, static_cast<uint32_t>(value));
 #endif
     internal::Isolate* isolate =
         internal::IsolateFromNeverReadOnlySpaceObject(obj);
@@ -11709,7 +11709,7 @@ Local<Value> Context::GetEmbedderData(int index) {
   // We read the full pointer value and then decompress it in order to avoid
   // dealing with potential endiannes issues.
   value =
-      I::DecompressTaggedAnyField(embedder_data, static_cast<int32_t>(value));
+      I::DecompressTaggedAnyField(embedder_data, static_cast<uint32_t>(value));
 #endif
   internal::Isolate* isolate = internal::IsolateFromNeverReadOnlySpaceObject(
       *reinterpret_cast<A*>(this));