diff --git a/packages/server/src/api/controllers/table/external.ts b/packages/server/src/api/controllers/table/external.ts
index a8f1c1ccbb..20e345cab7 100644
--- a/packages/server/src/api/controllers/table/external.ts
+++ b/packages/server/src/api/controllers/table/external.ts
@@ -217,7 +217,7 @@ export async function save(ctx: UserCtx<SaveTableRequest, SaveTableResponse>) {
     ...inputs,
   }
 
-  let oldTable
+  let oldTable: Table | undefined
   if (ctx.request.body && ctx.request.body._id) {
     oldTable = await sdk.tables.getTable(ctx.request.body._id)
   }
diff --git a/packages/server/src/api/controllers/table/utils.ts b/packages/server/src/api/controllers/table/utils.ts
index e1469bb267..0e5b784c66 100644
--- a/packages/server/src/api/controllers/table/utils.ts
+++ b/packages/server/src/api/controllers/table/utils.ts
@@ -418,7 +418,7 @@ export function areSwitchableTypes(type1: any, type2: any) {
   return false
 }
 
-export function hasTypeChanged(table: any, oldTable: any) {
+export function hasTypeChanged(table: Table, oldTable: Table | undefined) {
   if (!oldTable) {
     return false
   }