diff --git a/javascript/lib/types.ts b/javascript/lib/types.ts
index b22b1cb..9090bfe 100644
--- a/javascript/lib/types.ts
+++ b/javascript/lib/types.ts
@@ -257,7 +257,7 @@ export type InstanceStatus =
     }
   | { InstallingMods: { is_post_creation: boolean } }
   | "UninstallingMods"
-  | "InstallingPost"
+  | { InstallingPost: { is_post_creation: boolean } }
   | {
       UninstallingTerrains: {
         want_uninstall: Array<Terrain>;
diff --git a/rust/src/types/instance.rs b/rust/src/types/instance.rs
index 73cdc71..a34453e 100644
--- a/rust/src/types/instance.rs
+++ b/rust/src/types/instance.rs
@@ -134,7 +134,9 @@ pub enum InstanceStatus {
         is_post_creation: bool,
     },
     UninstallingMods,
-    InstallingPost,
+    InstallingPost {
+        is_post_creation: bool,
+    },
     UninstallingTerrains {
         want_uninstall: Vec<Terrain>,
         after_install: Vec<Terrain>,