diff --git a/desktop/src-tauri/src/managed_agents/types.rs b/desktop/src-tauri/src/managed_agents/types.rs
index 51761a0f92..82445106c9 100644
--- a/desktop/src-tauri/src/managed_agents/types.rs
+++ b/desktop/src-tauri/src/managed_agents/types.rs
@@ -88,6 +88,9 @@ pub struct ManagedAgentRecord {
     pub name: String,
     #[serde(default)]
     pub persona_id: Option<String>,
+    /// `#[serde(default)]` so an old build still parses a store whose inline
+    /// key was stripped after a keyring build migrated it into the Keychain.
+    #[serde(default)]
     pub private_key_nsec: String,
     /// NIP-OA auth tag JSON. Computed at agent creation time.
     ///