diff --git a/src/docs/part1/simple_detector.md b/src/docs/part1/simple_detector.md
index 45a4abb6fc611ef5b5bb445196d0aaaa2fb1d141..ca4ea3226281daf88481ab34422afe01171932ee 100644
--- a/src/docs/part1/simple_detector.md
+++ b/src/docs/part1/simple_detector.md
@@ -181,8 +181,8 @@ This accomplishes the following:
 Later on you can see its use while looping over hits:
 
 ```cpp
-auto pos0 = h.getPosition();
-auto pos1 = cellid_converter.position(h.getCellID());
+auto pos0 = h.position;
+auto pos1 = cellid_converter.position(h.cellID);
 ```
 Here `h` is a [EDM4hep SimTrackerHit](https://edm4hep.web.cern.ch/classedm4hep_1_1_sim_tracker_hit.html) 
 which has `position`, a