diff --git a/src/esp32/BluetoothSoftwareUpdate.cpp b/src/esp32/BluetoothSoftwareUpdate.cpp
index 870d20ffd..d097e95f8 100644
--- a/src/esp32/BluetoothSoftwareUpdate.cpp
+++ b/src/esp32/BluetoothSoftwareUpdate.cpp
@@ -58,7 +58,7 @@ int update_size_callback(uint16_t conn_handle, uint16_t attr_handle, struct ble_
     return 0;
 }
 
-#define MAX_BLOCKSIZE 512
+#define MAX_BLOCKSIZE_FOR_BT 512
 
 /// Handle writes to data
 int update_data_callback(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
@@ -66,7 +66,7 @@ int update_data_callback(uint16_t conn_handle, uint16_t attr_handle, struct ble_
     concurrency::LockGuard g(updateLock);
 
     static uint8_t
-        data[MAX_BLOCKSIZE]; // we temporarily copy here because I'm worried that a fast sender might be able overwrite srcbuf
+        data[MAX_BLOCKSIZE_FOR_BT]; // we temporarily copy here because I'm worried that a fast sender might be able overwrite srcbuf
 
     uint16_t len = 0;