diff --git a/packages/tools/src/structureTools.ts b/packages/tools/src/structureTools.ts
index fc274295b..fe8869e3c 100644
--- a/packages/tools/src/structureTools.ts
+++ b/packages/tools/src/structureTools.ts
@@ -12,7 +12,7 @@ export function addTableDependencies(db: DatabaseInfo): DatabaseInfo {
   };
 }
 
-function fillTableExtendedInfo(db: DatabaseInfo) {
+function fillTableExtendedInfo(db: DatabaseInfo): DatabaseInfo {
   return {
     ...db,
     tables: (db.tables || []).map(obj => ({