X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FLString.h;h=25809cba739ad9778241ed418e950b78c39b7638;hb=98c966c64594611e469313314abd1e59524adb4a;hp=daffa1e0fedd1669834a5559578fb24a93f79ecd;hpb=83acbbd5237373926c629855379e1df9a04209b2;p=lyx.git

diff --git a/src/LString.h b/src/LString.h
index daffa1e0fe..25809cba73 100644
--- a/src/LString.h
+++ b/src/LString.h
@@ -1,16 +1,20 @@
 // -*- C++ -*-
 /* This file is part of
  * ======================================================
- * 
+ *
  *           LyX, The Document Processor
- * 	 
+ *
  *	    Copyright 1995 Matthias Ettrich
  *          Copyright 1995-2001 The LyX Team.
  *
  * ====================================================== */
 
 #ifndef LSTRING_H
-#define LSTRING_H 
+#define LSTRING_H
+
+#ifndef _CONFIG_H
+#error The <config.h> header should always be included before LString.h
+#endif
 
 #ifndef USE_INCLUDED_STRING
 #include <string>