diff --git a/GeyserOptionalPack.md b/GeyserOptionalPack.md
index f0ab058..2d4d6d8 100644
--- a/GeyserOptionalPack.md
+++ b/GeyserOptionalPack.md
@@ -8,6 +8,8 @@ GeyserOptionalPack is a Bedrock resource pack that adds more features to Geyser
 - Missing particles, like sweep attack
 - Spectral arrow entity texture
 
+If your current server resource pack contains any entity definitions that overlap with the optional pack, you will need to merge the definitions for these entities for optional pack and your own pack to work correctly. Otherwise, the prevailing entity definition will be based on pack application order. This process is best performed manually due to the complexity of entity definition files, though it can also be [scripted](https://gist.github.com/Kas-tle/89c6adc3e7901fbabd1b9f71d902d0a6).
+
 A more complete list can be found on the optional pack's [README](https://github.com/GeyserMC/GeyserOptionalPack/blob/master/README.md). Implementation details for those interested in how features are added can be found [here](https://github.com/GeyserMC/GeyserOptionalPack/blob/master/developer_documentation.md).
 
 While recommended, it is not required to install the resource pack on the server - clients can install it themselves. Additionally, if you use a proxy like WaterdogPE, you can install the pack on the server without impacting gameplay on other Bedrock servers.
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