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Diffstat (limited to 'ace/WIN32_Asynch_IO.h')
-rw-r--r--ace/WIN32_Asynch_IO.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ace/WIN32_Asynch_IO.h b/ace/WIN32_Asynch_IO.h
index 18e1eb5d3d4..d3de0b40642 100644
--- a/ace/WIN32_Asynch_IO.h
+++ b/ace/WIN32_Asynch_IO.h
@@ -27,7 +27,7 @@
//
// ============================================================================
-#ifndef ACE_WIN32_ASYNCH_IO_H
+#if !defined (ACE_WIN32_ASYNCH_IO_H)
#define ACE_WIN32_ASYNCH_IO_H
#include "ace/OS.h"