diff --git a/src/decorator/common/IsLatitude.ts b/src/decorator/common/IsLatitude.ts
index 1be12e130e..df487afd6f 100644
--- a/src/decorator/common/IsLatitude.ts
+++ b/src/decorator/common/IsLatitude.ts
@@ -7,7 +7,7 @@ export const IS_LATITUDE = 'isLatitude';
 /**
  * Checks if a given value is a latitude.
  */
-export function isLatitude(value: string): boolean {
+export function isLatitude(value: number | string): boolean {
   return (typeof value === 'number' || typeof value === 'string') && isLatLong(`${value},0`);
 }
 
diff --git a/src/decorator/common/IsLongitude.ts b/src/decorator/common/IsLongitude.ts
index 013f5387af..ae18f67e04 100644
--- a/src/decorator/common/IsLongitude.ts
+++ b/src/decorator/common/IsLongitude.ts
@@ -7,7 +7,7 @@ export const IS_LONGITUDE = 'isLongitude';
 /**
  * Checks if a given value is a longitude.
  */
-export function isLongitude(value: string): boolean {
+export function isLongitude(value: number | string): boolean {
   return (typeof value === 'number' || typeof value === 'string') && isLatLong(`0,${value}`);
 }