1 files changed, 1 insertions, 1 deletions
diff --git a/src/pixeltypes.h b/src/pixeltypes.h
index addaafff..f28c2c67 100644
--- a/src/pixeltypes.h
+++ b/src/pixeltypes.h
@@ -420,7 +420,7 @@ struct CRGB {
     }
 
     /// invert each channel
-    inline CRGB operator- ()
+    inline CRGB operator- () const
     {
         CRGB retval;
         retval.r = 255 - r;