diff -ur doomlegacy_142_src.orig/sdl/i_system.c doomlegacy_142_src/sdl/i_system.c
--- doomlegacy_142_src.orig/sdl/i_system.c	2004-05-09 11:51:20.913122680 +0200
+++ doomlegacy_142_src/sdl/i_system.c	2004-05-09 14:54:23.716482784 +0200
@@ -734,6 +734,11 @@
 
 void I_LocateWad(void) {
     // relict from the Linux version
+#ifdef LINUX
+#define WADLOCATION "GENTOO_DATADIR"
+    if(chdir(WADLOCATION))
+    	fprintf (stderr, "Error: chdir() " WADLOCATION " failed\n");
+#endif
     return;
 }