diff --git a/docs/flashing_os.md b/docs/flashing_os.md
index 86930c00..9804cf3d 100644
--- a/docs/flashing_os.md
+++ b/docs/flashing_os.md
@@ -37,6 +37,7 @@ Decompress and flash the image. Be careful when choosing your device path:
 
 You can also use `dd_rescue` or `ddrescue`.
 
+!!! warning "Check the advanced settings (CTRL+SHIFT+X), make sure they are blank or the flash will fail"
 
 ### Using RPi Imager (Linux, MacOS and Windows)