diff --git a/lib/zin/wg/think3c/js/v1.js b/lib/zin/wg/think3c/js/v1.js
index 3c19477e50..4c68e894ed 100644
--- a/lib/zin/wg/think3c/js/v1.js
+++ b/lib/zin/wg/think3c/js/v1.js
@@ -275,7 +275,7 @@ function findRegions(pixels, width, height)
                 if(region.area > 100)
                 {
                     region.rows.forEach((row, key) => {
-                        row = processRegionRows(row);
+                        region.rows[key] = processRegionRows(row);
                     });
                     regions.push(region);
                 }