diff --git a/src/stitching_scanner.py b/src/stitching_scanner.py
index feebda0..d07d097 100644
--- a/src/stitching_scanner.py
+++ b/src/stitching_scanner.py
@@ -462,8 +462,8 @@ class StitchingScanner:
                 stop_reason = 'max_dim'
                 break
 
-            if abs(total_x) >= max_mosaic_width:
-                self.log(f"Max dimension reached ({max_mosaic_width}px)")
+            if abs(total_x) >= self.config.max_mosaic_width:
+                self.log(f"Max dimension reached ({self.config.max_mosaic_width}px)")
                 stop_reason = 'max_dim'
                 break
             # Pulse motor