diff --git a/ecmascript/containers/containers_bitvector.cpp b/ecmascript/containers/containers_bitvector.cpp
index ceb01dde30..3ea4606331 100644
--- a/ecmascript/containers/containers_bitvector.cpp
+++ b/ecmascript/containers/containers_bitvector.cpp
@@ -57,7 +57,7 @@ JSTaggedValue ContainersBitVector::BitVectorConstructor(EcmaRuntimeCallInfo* arg
 
     auto* newBitSetVector = new std::vector<std::bitset<JSAPIBitVector::BIT_SET_LENGTH>>();
     if (!length->IsZero()) {
-        int32_t capacity = (length->GetInt() >> JSAPIBitVector::TAGGED_VALUE_BIT_SIZE) + 1;
+        int32_t capacity = (length->GetInt() / JSAPIBitVector::BIT_SET_LENGTH) + 1;
 
         std::bitset<JSAPIBitVector::BIT_SET_LENGTH> initBitSet;
         newBitSetVector->resize(capacity, initBitSet);
diff --git a/ecmascript/js_api/js_api_bitvector.cpp b/ecmascript/js_api/js_api_bitvector.cpp
index a7da7ba165..e5d96e399e 100644
--- a/ecmascript/js_api/js_api_bitvector.cpp
+++ b/ecmascript/js_api/js_api_bitvector.cpp
@@ -428,8 +428,8 @@ void JSAPIBitVector::Resize(JSThread* thread, const JSHandle<JSAPIBitVector>& bi
     [[maybe_unused]] ConcurrentApiScope<JSAPIBitVector, ModType::WRITE> scope(thread,
         bitVector.GetTaggedValue().GetTaggedObject());
     int length = bitVector->GetLength().GetInt();
-    uint32_t elementsLength = ((length - 1) >> JSAPIBitVector::TAGGED_VALUE_BIT_SIZE) + 1;
-    uint32_t newElementsLength = ((newSize - 1) >> JSAPIBitVector::TAGGED_VALUE_BIT_SIZE) + 1;
+    uint32_t elementsLength = ((length - 1) / BIT_SET_LENGTH) + 1;
+    uint32_t newElementsLength = ((newSize - 1) / BIT_SET_LENGTH) + 1;
 
     JSHandle<JSNativePointer> np(thread, bitVector->GetNativePointer());
     auto elements = reinterpret_cast<std::vector<std::bitset<BIT_SET_LENGTH>>*>(np->GetExternalPointer());