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-rw-r--r--src/uscxml/concurrency/tinythread.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/uscxml/concurrency/tinythread.h b/src/uscxml/concurrency/tinythread.h
index 867f036..cf313d5 100644
--- a/src/uscxml/concurrency/tinythread.h
+++ b/src/uscxml/concurrency/tinythread.h
@@ -25,6 +25,7 @@ freely, subject to the following restrictions:
#define _TINYTHREAD_H_
#include "uscxml/Common.h"
+#include <ostream>
/// @file
/// @mainpage TinyThread++ API Reference