diff --git a/README b/README
index ac096dc..db150fd 100644
--- a/README
+++ b/README
@@ -18,6 +18,7 @@ Usage: ./stm32loader.py [-hqVewvr] [-l length] [-p port] [-b baud] [-a addr] [fi
     -p port     Serial port (default: /dev/tty.usbserial-ftCYPMYJ)
     -b baud     Baud speed (default: 115200)
     -a addr     Target address
+    -g addr     Address to start running at (0x08000000, usually)
 
     ./stm32loader.py -e -w -v example/main.bin