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-rw-r--r--editor/ppmdist.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/editor/ppmdist.c b/editor/ppmdist.c
index 90c2e3d3..bca96adc 100644
--- a/editor/ppmdist.c
+++ b/editor/ppmdist.c
@@ -125,7 +125,7 @@ main(int argc, char *argv[]) {
          * by frequency - but again, for a small number of colors
          * it's a small matter.
          */
-        colorToGrayMap[color].gray = PPM_LUMIN(hist[color].color);
+        colorToGrayMap[color].gray = ppm_luminosity(hist[color].color);
     }
 
     /*