diff --git a/boards.txt b/boards.txt
index 66b2eb6eb..ffbcd7f15 100644
--- a/boards.txt
+++ b/boards.txt
@@ -119,7 +119,7 @@ generic.menu.FlashSize.4M1M.build.spiffs_start=0x300000
 generic.menu.FlashSize.4M1M.build.spiffs_end=0x3FB000
 generic.menu.FlashSize.4M1M.build.spiffs_blocksize=8192
 generic.menu.FlashSize.4M1M.build.spiffs_pagesize=256
-generic.menu.FlashSize.4M1M.upload.maximum_size=3044464
+generic.menu.FlashSize.4M1M.upload.maximum_size=1044464
 
 generic.menu.FlashSize.4M=4M (3M SPIFFS)
 generic.menu.FlashSize.4M.build.flash_size=4M