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-rw-r--r--src/decryption_context.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/decryption_context.h b/src/decryption_context.h
index e3d3ce1e..fb8342cf 100644
--- a/src/decryption_context.h
+++ b/src/decryption_context.h
@@ -31,6 +31,9 @@
files in the program, then also delete it here.
*/
+#ifndef LIBDCP_DECRYPTION_CONTEXT_H
+#define LIBDCP_DECRYPTION_CONTEXT_H
+
#include "key.h"
#include <boost/optional.hpp>
@@ -55,3 +58,5 @@ private:
};
}
+
+#endif