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-rw-r--r--src/time_pair.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/time_pair.h b/src/time_pair.h
index 0ed039d..404c143 100644
--- a/src/time_pair.h
+++ b/src/time_pair.h
@@ -17,6 +17,9 @@
*/
+#ifndef LIBSUB_TIME_PAIR_H
+#define LIBSUB_TIME_PAIR_H
+
#include "frame_time.h"
#include "metric_time.h"
#include <boost/optional.hpp>
@@ -55,3 +58,5 @@ private:
};
}
+
+#endif