diff --git a/src/Common/PODArray.h b/src/Common/PODArray.h
index 579d500e6df..aa7454badd6 100644
--- a/src/Common/PODArray.h
+++ b/src/Common/PODArray.h
@@ -166,17 +166,6 @@ protected:
         return (stack_threshold > 0) && (allocated_bytes() <= stack_threshold);
     }
 
-    bool shouldReserveForNextSizeBeforeInsert() const
-    {
-        /** end_of_storage = left_padding + (start + elements_size * ELEMENT_SIZE).
-          * end = start + elements_size * ELEMENT_SIZE
-          * We use end + ELEMENT_SIZE >= end_of_storage because it
-          * It is not safe to use end == end_of_storage here because left_padding
-          * is not always multiple of ELEMENT_SIZE.
-          */
-        return (c_end + ELEMENT_SIZE) >= c_end_of_storage;
-    }
-
     template <typename ... TAllocatorParams>
     void reserveForNextSize(TAllocatorParams &&... allocator_params)
     {
@@ -441,7 +430,7 @@ public:
     template <typename U, typename ... TAllocatorParams>
     void push_back(U && x, TAllocatorParams &&... allocator_params)
     {
-        if (unlikely(this->shouldReserveForNextSizeBeforeInsert()))
+        if (unlikely(this->c_end == this->c_end_of_storage))
             this->reserveForNextSize(std::forward<TAllocatorParams>(allocator_params)...);
 
         new (t_end()) T(std::forward<U>(x));
@@ -454,7 +443,7 @@ public:
     template <typename... Args>
     void emplace_back(Args &&... args)
     {
-        if (unlikely(this->shouldReserveForNextSizeBeforeInsert()))
+        if (unlikely(this->c_end == this->c_end_of_storage))
             this->reserveForNextSize();
 
         new (t_end()) T(std::forward<Args>(args)...);