Fix name of dependency to build

README.md

@@ -8,7 +8,7 @@ You need `make` and `SDL1` to build this project.
 
 Example on Ubuntu :
 ```sh
-$ sudo apt install make g++ libsdl-dev libsdl-gfx1.2-dev
+$ sudo apt install make g++ libsdl1.2-dev libsdl-gfx1.2-dev
 $ make
 ```