diff --git a/src/blackmisc/atomicfile.cpp b/src/blackmisc/atomicfile.cpp
index 04aa0d60f..b28bda36f 100644
--- a/src/blackmisc/atomicfile.cpp
+++ b/src/blackmisc/atomicfile.cpp
@@ -111,7 +111,7 @@ namespace BlackMisc
     QString CAtomicFile::randomSuffix()
     {
         constexpr auto max = 2176782335;
-        return QString::number(std::uniform_int_distribution<std::decay_t<decltype(max)>>(0, max)(Private::defaultRandomGenerator()), 36);
+        return QString("%1").arg(std::uniform_int_distribution<std::decay_t<decltype(max)>>(0, max)(Private::defaultRandomGenerator()), 6, 36, QChar('0'));
     }
 
 #if defined(Q_OS_POSIX)