--- lib/wnnlib.c.orig	Thu May 27 01:55:26 1999
+++ lib/wnnlib.c	Wed Apr 26 02:18:48 2000
@@ -3554,9 +3554,9 @@ int timeout;
 #if defined(LIBDIR) && JSERVER_VERSION > 0x4030
 		static char envrc[256];
 		rcfile = envrc;
-		(void)sprintf(rcfile, "%s/ja_JP/wnnenvrc", LIBDIR);
+		(void)snprintf(rcfile, sizeof(envrc), "%s/ja_JP/wnnenvrc", LIBDIR);
 		if (access(rcfile, R_OK) != 0)
-		    (void) sprintf(rcfile, "%s/wnnenvrc", LIBDIR);
+		    (void) snprintf(rcfile, sizeof(envrc), "%s/wnnenvrc", LIBDIR);
 #else
 		rcfile = "wnnenvrc";
 #endif
