diff --git a/src/ESPAsyncWebServer.h b/src/ESPAsyncWebServer.h
index 0fce863..3b4e175 100644
--- a/src/ESPAsyncWebServer.h
+++ b/src/ESPAsyncWebServer.h
@@ -101,6 +101,7 @@ namespace fs {
 
 // if this value is returned when asked for data, packet will not be sent and you will be asked for data again
 #define RESPONSE_TRY_AGAIN 0xFFFFFFFF
+#define RESPONSE_STREAM_BUFFER_SIZE 1460
 
 typedef uint8_t WebRequestMethodComposite;
 typedef std::function<void(void)> ArDisconnectHandler;
@@ -377,8 +378,8 @@ class AsyncWebServerRequest {
     AsyncWebServerResponse* beginChunkedResponse(const char* contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback = nullptr);
     AsyncWebServerResponse* beginChunkedResponse(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback = nullptr);
 
-    AsyncResponseStream* beginResponseStream(const char* contentType, size_t bufferSize = 1460);
-    AsyncResponseStream* beginResponseStream(const String& contentType, size_t bufferSize = 1460) { return beginResponseStream(contentType.c_str(), bufferSize); }
+    AsyncResponseStream* beginResponseStream(const char* contentType, size_t bufferSize = RESPONSE_STREAM_BUFFER_SIZE);
+    AsyncResponseStream* beginResponseStream(const String& contentType, size_t bufferSize = RESPONSE_STREAM_BUFFER_SIZE) { return beginResponseStream(contentType.c_str(), bufferSize); }
 
 #ifndef ESP8266
     [[deprecated("Replaced by beginResponse(...)")]]
diff --git a/src/WebRequest.cpp b/src/WebRequest.cpp
index da17d7a..0dd0d21 100644
--- a/src/WebRequest.cpp
+++ b/src/WebRequest.cpp
@@ -340,7 +340,7 @@ void AsyncWebServerRequest::_parsePlainPostChar(uint8_t data) {
 void AsyncWebServerRequest::_handleUploadByte(uint8_t data, bool last) {
   _itemBuffer[_itemBufferIndex++] = data;
 
-  if (last || _itemBufferIndex == 1460) {
+  if (last || _itemBufferIndex == RESPONSE_STREAM_BUFFER_SIZE) {
     // check if authenticated before calling the upload
     if (_handler)
       _handler->handleUpload(this, _itemFilename, _itemSize - _itemBufferIndex, _itemBuffer, _itemBufferIndex, false);
@@ -444,7 +444,7 @@ void AsyncWebServerRequest::_parseMultipartPostByte(uint8_t data, bool last) {
         if (_itemIsFile) {
           if (_itemBuffer)
             free(_itemBuffer);
-          _itemBuffer = (uint8_t*)malloc(1460);
+          _itemBuffer = (uint8_t*)malloc(RESPONSE_STREAM_BUFFER_SIZE);
           if (_itemBuffer == NULL) {
             _multiParseState = PARSE_ERROR;
             return;