diff --git a/docs/Building-Transmission.md b/docs/Building-Transmission.md
index 8da31a3cd..9db77f524 100644
--- a/docs/Building-Transmission.md
+++ b/docs/Building-Transmission.md
@@ -44,7 +44,7 @@ On Debian, you can build transmission with a few dependencies on top of a base i
 
 For building transmission-daemon you will need basic dependencies
 ```console
-$ sudo apt install git build-essential cmake libcurl4-openssl-dev libssl-dev
+$ sudo apt install git build-essential cmake libcurl4-openssl-dev libssl-dev python3
 ```
 You likely want to install transmission as a native GUI application. There are two options, GTK and QT.