diff --git a/wl_def.h b/wl_def.h
index 48007f5..0971507 100644
--- a/wl_def.h
+++ b/wl_def.h
@@ -915,7 +915,7 @@ extern  unsigned screenofs;
 
 extern  boolean  startgame;
 extern  char     str[80];
-extern  char     configname[13];
+extern  char     configname[128];
 
 //
 // Command line parameter variables
diff --git a/wl_main.cpp b/wl_main.cpp
index dca0e89..6918213 100644
--- a/wl_main.cpp
+++ b/wl_main.cpp
@@ -73,7 +73,7 @@ boolean startgame;
 boolean loadedgame;
 int     mouseadjustment;
 
-char    configname[13]="config.";
+char    configname[128];
 
 //
 // Command line parameter variables
diff --git a/wl_menu.cpp b/wl_menu.cpp
index 5591803..b25249c 100644
--- a/wl_menu.cpp
+++ b/wl_menu.cpp
@@ -14,6 +14,8 @@
 #endif
 
 #include "wl_def.h"
+#include <string>
+#include <errno.h>
 #pragma hdrstop
 
 extern int lastgamemusicoffset;
@@ -3982,6 +3984,41 @@ ShootSnd (void)
     SD_PlaySound (SHOOTSND);
 }
 
+static void InitConfigname()
+{
+	if (configname[0])
+		/* already initialized */
+		return;
+	const char *home = getenv("HOME");
+	if (!home)
+	{
+		Quit("You must set $HOME.");
+		return;
+	}
+	std::string s = home;
+#define DOT_WOLF_DIR	"/.wolf4sdl"
+#ifdef SPEAR
+#define CONFIG_BASENAME	"/spear."
+#else
+#define CONFIG_BASENAME	"/wolf3d."
+#endif
+	if (s.length() > sizeof(configname) - sizeof(DOT_WOLF_DIR) - sizeof(CONFIG_BASENAME))
+	{
+		Quit("Your $HOME is too long.");
+		return;
+	}
+	s += DOT_WOLF_DIR;
+	errno = 0;
+	int r = mkdir(s.c_str(), 0755);
+	if (r != 0 && errno != EEXIST)
+	{
+		int e = errno;
+		Quit("Failed to mkdir %s: %s", s.c_str(), strerror(e));
+		return;
+	}
+	s += CONFIG_BASENAME;
+	SDL_strlcpy(configname, s.c_str(), sizeof(configname));
+}
 
 ///////////////////////////////////////////////////////////////////////////
 //
@@ -3992,6 +4029,7 @@ void
 CheckForEpisodes (void)
 {
     struct stat statbuf;
+	InitConfigname();
 
 //
 // JAPANESE VERSION