diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f068d67b25e..cce3194d9a7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -100,6 +100,8 @@ Always remember to pay attention to [the quest guidelines](https://github.com/st
 
 Inheritance and class hierarchy should be avoided if possible. It is preferable to extract shared code to helper file such as [KerbUtil.kt](app/src/main/java/de/westnordost/streetcomplete/osm/kerb/KerbUtil.kt).
 
+It is recommended to install the [Ktlint (unofficial)](https://plugins.jetbrains.com/plugin/15057-ktlint-unofficial-) Android Studio plugin which highlights lint issues (e.g. inconsistent spacing) directly inline while writing code.
+
 ### Hints for more active people
 
 See ["Efficiently working together"](https://github.com/streetcomplete/StreetComplete/discussions/3450) which is addressed to people highly active in this project.