diff --git a/include/ArduinoJson/Internals/BlockJsonBuffer.hpp b/include/ArduinoJson/Internals/BlockJsonBuffer.hpp
index 55662b4f..b9bf02ea 100644
--- a/include/ArduinoJson/Internals/BlockJsonBuffer.hpp
+++ b/include/ArduinoJson/Internals/BlockJsonBuffer.hpp
@@ -68,7 +68,6 @@ class BlockJsonBuffer : public JsonBuffer {
 
   void* allocInNewBlock(size_t bytes) {
     size_t capacity = _nextBlockSize;
-    if (_head != NULL) capacity = _head->capacity * 2;
     if (bytes > capacity) capacity = bytes;
     if (!addNewBlock(capacity)) return NULL;
     _nextBlockSize *= 2;