diff -Naur a/common/d_main.cpp b/common/d_main.cpp
--- a/common/d_main.cpp	2019-07-22 19:11:28.000000000 +0100
+++ b/common/d_main.cpp	2019-09-09 22:57:47.624246017 +0100
@@ -459,6 +459,7 @@
 	D_AddSearchDir(dirs, INSTALL_PREFIX "/" INSTALL_DATADIR "/games/odamex", separator);
 	#endif
 
+	D_AddSearchDir(dirs, "/usr/share/doom", separator);
 	D_AddSearchDir(dirs, "/usr/share/games/doom", separator);
 	D_AddSearchDir(dirs, "/usr/local/share/games/doom", separator);
 	D_AddSearchDir(dirs, "/usr/local/share/doom", separator);