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-rw-r--r--src/lib/frame_interval_checker.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/lib/frame_interval_checker.h b/src/lib/frame_interval_checker.h
index e8f537c1a..8d8c6743e 100644
--- a/src/lib/frame_interval_checker.h
+++ b/src/lib/frame_interval_checker.h
@@ -19,6 +19,10 @@
*/
+#ifndef DCPOMATIC_FRAME_INTERVAL_CHECKER_H
+#define DCPOMATIC_FRAME_INTERVAL_CHECKER_H
+
+
#include "dcpomatic_time.h"
#include <boost/optional.hpp>
#include <vector>
@@ -53,3 +57,6 @@ private:
static int const _frames;
};
+
+#endif
+