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-rw-r--r--src/colour_matrix.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/colour_matrix.h b/src/colour_matrix.h
index 13bbc821..615e8b38 100644
--- a/src/colour_matrix.h
+++ b/src/colour_matrix.h
@@ -21,9 +21,9 @@ namespace libdcp {
namespace colour_matrix {
-extern float const xyz_to_rgb[3][3];
-extern float const srgb_to_xyz[3][3];
-extern float const rec709_to_xyz[3][3];
+extern double const xyz_to_rgb[3][3];
+extern double const srgb_to_xyz[3][3];
+extern double const rec709_to_xyz[3][3];
}