diff -ur a/src/gameconfigfile.cpp b/src/gameconfigfile.cpp
--- a/src/gameconfigfile.cpp	2014-09-10 15:49:16.484435366 +0200
+++ b/src/gameconfigfile.cpp	2014-09-10 15:49:28.591101911 +0200
@@ -139,6 +139,7 @@
 #else
 		SetValueForKey ("Path", "~/" GAME_DIR, true);
 		SetValueForKey ("Path", SHARE_DIR, true);
+		SetValueForKey ("Path", "/usr/share/doom", true);
 #endif
 	}