diff -ur a/src/gameconfigfile.cpp b/src/gameconfigfile.cpp
--- a/src/gameconfigfile.cpp	2013-07-03 02:47:30.000000000 +0200
+++ b/src/gameconfigfile.cpp	2013-07-13 11:43:45.110540335 +0200
@@ -141,6 +141,7 @@
 #else
 		SetValueForKey ("Path", "~/" GAME_DIR, true);
 		SetValueForKey ("Path", SHARE_DIR, true);
+		SetValueForKey ("Path", "/usr/share/doom", true);
 #endif
 	}