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-rw-r--r--ACE/ace/Null_Semaphore.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/ACE/ace/Null_Semaphore.h b/ACE/ace/Null_Semaphore.h
index 9124f46cf73..5a3597b805c 100644
--- a/ACE/ace/Null_Semaphore.h
+++ b/ACE/ace/Null_Semaphore.h
@@ -19,6 +19,7 @@
// All methods in this class are inline, so there is no
// need to import or export on Windows. -- CAE 12/18/2003
#include "ace/os_include/os_errno.h"
+#include "ace/os_include/sys/os_types.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once