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-rw-r--r--malloc/obstack.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/malloc/obstack.h b/malloc/obstack.h
index b60828b6ae..ad6b830fcb 100644
--- a/malloc/obstack.h
+++ b/malloc/obstack.h
@@ -104,8 +104,8 @@ Summary:
 
 /* Don't do the contents of this file more than once.  */
 
-#ifndef __OBSTACK_H__
-#define __OBSTACK_H__
+#ifndef _OBSTACK_H
+#define _OBSTACK_H 1
 
 #ifdef __cplusplus
 extern "C" {
@@ -587,4 +587,4 @@ __extension__								\
 }	/* C++ */
 #endif
 
-#endif /* not __OBSTACK_H__ */
+#endif /* obstack.h */