diff --git a/src/stitching_scanner.py b/src/stitching_scanner.py
index 7bcf445..4c2d528 100644
--- a/src/stitching_scanner.py
+++ b/src/stitching_scanner.py
@@ -533,7 +533,7 @@ class StitchingScanner:
                 self.log(f"Strip alignment: displacement too large ({dx:.1f}, {dy:.1f}), ignoring")
                 return offset
             
-            offset.x_offset = dx
+            offset.x_offset = dx * -1
             offset.y_offset = dy
             offset.confidence = confidence
             offset.valid = confidence > 0.1  # Require minimum confidence