diff --git a/src/plugins/globalization.ts b/src/plugins/globalization.ts
index e6793a4bd..eacc75a34 100644
--- a/src/plugins/globalization.ts
+++ b/src/plugins/globalization.ts
@@ -107,7 +107,7 @@ export class Globalization {
     successIndex:  1,
     errorIndex:  2
   })
-  static stringToNumber(stringToConvert: string, options: {type: string}): Promise<{value}> {return; }
+  static stringToNumber(stringToConvert: string, options: {type: string}): Promise<{value:number|string}> {return; }
 
   /**
    *