diff --git a/Debugging-state-reconstruction.md b/Debugging-state-reconstruction.md
index 2d5ddb6..cc2402f 100644
--- a/Debugging-state-reconstruction.md
+++ b/Debugging-state-reconstruction.md
@@ -2,7 +2,7 @@ Nimbus will start sync automatically as soon as it connects to enough peers. How
 
 1. Launch a local eth node, e.g:
 ```
-geth --gcmode archive
+geth --syncmode full --gcmode archive
 ```
 2. Note the enode url printed in the logs, e.g.:
 `enode://a52e914fa5aa46409e526a342a1e68b4e572c720e6eb1e61ad4a4201937679e7ebd26915bdabb2fdab6add7d85ba537078dbdccca89816a40ffc375572b6f73d@100.67.97.7:30303`