diff --git a/rtengine/camconst.json b/rtengine/camconst.json
index 169b0b0b7..32e8bc628 100644
--- a/rtengine/camconst.json
+++ b/rtengine/camconst.json
@@ -2144,7 +2144,7 @@ Camera constants:
 
     { // Quality B, per ISO info missing
         "make_model": [ "Panasonic DC-S1", "Panasonic DC-S1R" ],
-        "ranges": { "white": 16383 }
+        "ranges": { "white": 16225 }
     },
 
     { // Quality B, per ISO info missing