diff --git a/rtengine/camconst.json b/rtengine/camconst.json
index 2b92cec89..e462c34bd 100644
--- a/rtengine/camconst.json
+++ b/rtengine/camconst.json
@@ -1260,6 +1260,7 @@ Camera constants:
 
     { // Quality C
         "make_model": "Canon EOS R6m2",
+        "dcraw_matrix": [9539, -2795, -1224, -4175, 11998, 2458, -465, 1755, 6048],
         "raw_crop": [
             {"frame": [6188, 4120], "crop": [154, 96, 6028, 4024]},
             {"frame": [3936, 2612], "crop": [156, 96, 3780, 2516]}