diff --git a/rtengine/capturesharpening.cc b/rtengine/capturesharpening.cc
index 8d9ee5b64..df2b1d908 100644
--- a/rtengine/capturesharpening.cc
+++ b/rtengine/capturesharpening.cc
@@ -530,7 +530,7 @@ BENCHFUN
     }
 
     constexpr int tileSize = 194;
-    constexpr int border = 3;
+    constexpr int border = 5;
     constexpr int fullTileSize = tileSize + 2 * border;
 
     double progress = startVal;