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-rw-r--r--libdimension/dimension/color.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libdimension/dimension/color.h b/libdimension/dimension/color.h
index 5d00b7b..5567628 100644
--- a/libdimension/dimension/color.h
+++ b/libdimension/dimension/color.h
@@ -65,7 +65,7 @@ typedef struct {
} dmnsn_sRGB;
/* Standard whitepoint, determined by the conversion of sRGB white to XYZ */
-extern dmnsn_CIE_XYZ dmnsn_whitepoint;
+extern const dmnsn_CIE_XYZ dmnsn_whitepoint;
dmnsn_color dmnsn_color_from_XYZ(dmnsn_CIE_XYZ XYZ);
dmnsn_color dmnsn_color_from_xyY(dmnsn_CIE_xyY xyY);