diff --git a/migrate/v0_26/iavl-v1.md b/migrate/v0_26/iavl-v1.md
index 3496efe24..a88e3470f 100644
--- a/migrate/v0_26/iavl-v1.md
+++ b/migrate/v0_26/iavl-v1.md
@@ -9,6 +9,8 @@ unless otherwise specified.
 
 Steps for using IAVL V1:
 
+**Note:** Nodes running IAVL V1 should set `iavl-disable-fastnode = true` in their `app.toml` file.
+
 **For `goleveldb` nodes:**
 1. Replace or recreate your node data with IAVL V1: see [Data](#data).
 2. Install an IAVL V1 binary: