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-rw-r--r--ace/POSIX_Asynch_IO.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ace/POSIX_Asynch_IO.h b/ace/POSIX_Asynch_IO.h
index 57335f7b003..8fb292f726e 100644
--- a/ace/POSIX_Asynch_IO.h
+++ b/ace/POSIX_Asynch_IO.h
@@ -24,7 +24,7 @@
//
// ============================================================================
-#ifndef ACE_POSIX_ASYNCH_IO_H
+#if !defined (ACE_POSIX_ASYNCH_IO_H)
#define ACE_POSIX_ASYNCH_IO_H
#include "ace/OS.h"