diff --git a/src/seasidecache.cpp b/src/seasidecache.cpp
index 483bd9f..d1ec8b4 100644
--- a/src/seasidecache.cpp
+++ b/src/seasidecache.cpp
@@ -3099,7 +3099,7 @@ QString SeasideCache::exportContacts()
     }
     QFile vcard(baseDir
               + QDir::separator()
-              + QDateTime::currentDateTime().toString("ss_mm_hh_dd_mm_yyyy")
+              + QLocale::c().toString(QDateTime::currentDateTime(), QStringLiteral("ss_mm_hh_dd_mm_yyyy"))
               + ".vcf");
 
     if (!vcard.open(QIODevice::WriteOnly)) {