diff --git a/docs/src/content/docs/ref/core-common.mdx b/docs/src/content/docs/ref/core-common.mdx
index 5be06ec51..4afcbf27e 100644
--- a/docs/src/content/docs/ref/core-common.mdx
+++ b/docs/src/content/docs/ref/core-common.mdx
@@ -138,7 +138,7 @@ let oldTonFoundationAddr: Address =
 
 :::caution
 
-  Make sure your specify only supported chain ids.
+  Make sure your specify only supported chain IDs: $0$ for the basechain and $-1$ for the masterchain.
 
 :::