diff --git a/User-patches.md b/User-patches.md
index 2688a96..9bb88f8 100644
--- a/User-patches.md
+++ b/User-patches.md
@@ -20,6 +20,9 @@ Names starting with:
 * `8` are executed before exit and before settings get saved,
 * `9` are executed right before exit.
 
+# Known limitations
+* On Android user patches don't work in the [FDroid version of KOReader](https://f-droid.org/en/packages/org.koreader.launcher.fdroid/). The package id for such version is `org.koreader.launcher.fdroid` and it is installed either from FDroid application or using the apk file available at the mentioned page. You have to manually install the release version that has the package id `org.koreader.launcher`
+
 # Available_patches
 
 (https://github.com/koreader/koreader/issues?q=+label%3A%22User+patch+available%22+)