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-rw-r--r--src/colour_conversion.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/colour_conversion.h b/src/colour_conversion.h
index e1ee1b11..559707af 100644
--- a/src/colour_conversion.h
+++ b/src/colour_conversion.h
@@ -17,6 +17,9 @@
*/
+#ifndef DCP_COLOUR_CONVERSION_H
+#define DCP_COLOUR_CONVERSION_H
+
#include "chromaticity.h"
#include <boost/shared_ptr.hpp>
#include <boost/numeric/ublas/matrix.hpp>
@@ -140,3 +143,5 @@ protected:
};
}
+
+#endif