Index: lib/Headers/float.h
===================================================================
--- lib/Headers/float.h	(Revision 201876)
+++ lib/Headers/float.h	(Arbeitskopie)
@@ -21,8 +21,8 @@
  *===-----------------------------------------------------------------------===
  */
 
-#ifndef __FLOAT_H
-#define __FLOAT_H
+#ifndef __CLANG_FLOAT_H
+#define __CLANG_FLOAT_H
 
 /* If we're on MinGW, fall back to the system's float.h, which might have
  * additional definitions provided for Windows.