diff --git a/platform/platform.android.ts b/platform/platform.android.ts
index 7025b94d0..fcd19c089 100644
--- a/platform/platform.android.ts
+++ b/platform/platform.android.ts
@@ -87,7 +87,7 @@ export class device implements definition.device {
 
     static get language(): string {
         if (!device._language) {
-            device._language = java.util.Locale.getDefault().getLanguage();
+            device._language = java.util.Locale.getDefault().getLanguage().replace("_", "-");
         }
 
         return device._language;