diff --git a/src/android/org/linphone/contacts/ContactsManager.java b/src/android/org/linphone/contacts/ContactsManager.java
index 8ca11376d..85135f977 100644
--- a/src/android/org/linphone/contacts/ContactsManager.java
+++ b/src/android/org/linphone/contacts/ContactsManager.java
@@ -575,7 +575,7 @@ public class ContactsManager extends ContentObserver implements FriendListListen
         }
 
         long timeElapsed = (new Date()).getTime() - contactsTime.getTime();
-        String time = String.format("%02d:%02d:%03d",
+        String time = String.format(Locale.getDefault(), "%02d:%02d:%03d",
                 TimeUnit.MILLISECONDS.toMinutes(timeElapsed),
                 TimeUnit.MILLISECONDS.toSeconds(timeElapsed) -
                         TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(timeElapsed)),