diff --git a/openflexure_microscope/stage/sanga.py b/openflexure_microscope/stage/sanga.py
index 491d2a6f..e4f372d8 100644
--- a/openflexure_microscope/stage/sanga.py
+++ b/openflexure_microscope/stage/sanga.py
@@ -51,7 +51,8 @@ class SangaStage(BaseStage):
 
     @property
     def position(self):
-        return self.board.position
+        with self.lock:
+            return self.board.position
 
     @property
     def backlash(self):