diff --git a/rtengine/camconst.json b/rtengine/camconst.json
index 4aae51a29..db6b25493 100644
--- a/rtengine/camconst.json
+++ b/rtengine/camconst.json
@@ -532,7 +532,7 @@ Camera constants:
     },
 
     { // Quality B, some missing scaling factors are safely guessed
-        "make_model": [ "Canon EOS 6D Mark II", "Canon EOS RP" ],
+        "make_model": "Canon EOS 6D Mark II",
         "dcraw_matrix": [ 6875,-970,-932,-4691,12459,2501,-874,1953,5809 ], // DNG v_9.12 D65
         "raw_crop": [ 120, 44, 6264, 4180 ], // fullraw size 6384x4224 useful 120,44,6264x4180 // TODO: See EOS RP
         // "raw_crop": [ 128, 52, 6248, 4168 ], // official jpeg crop 120+12,44+12,6240x4160