diff --git a/src/modules/users/CreateUserJob.cpp b/src/modules/users/CreateUserJob.cpp
index 422b77c05..c55ee1858 100644
--- a/src/modules/users/CreateUserJob.cpp
+++ b/src/modules/users/CreateUserJob.cpp
@@ -70,7 +70,8 @@ createUser( const QString& loginName, const QString& fullName, const QString& sh
     useraddCommand << "-c" << fullName;
     if ( umask >= 0 )
     {
-        useraddCommand << "-K" << ( QStringLiteral( "UMASK=" ) + QString::number( umask, 8 ) );
+        // The QChar() is needed to disambiguate from the overload that takes a double
+        useraddCommand << "-K" << ( QStringLiteral( "UMASK=%1" ).arg( umask, 3, 8, QChar( '0' ) ) );
     }
     useraddCommand << loginName;
 #endif
diff --git a/src/modules/users/Tests.cpp b/src/modules/users/Tests.cpp
index 4593b5890..76446064c 100644
--- a/src/modules/users/Tests.cpp
+++ b/src/modules/users/Tests.cpp
@@ -519,15 +519,17 @@ UserTests::testUserUmask_data()
     QTest::addColumn< QString >( "filename" );
     QTest::addColumn< int >( "permission" );
     QTest::addColumn< int >( "umask" );
+    QTest::addColumn< QString >( "umask_string" );
 
-    QTest::newRow( "good " ) << "tests/8a-issue-2362.conf" << 0700 << 0077;
-    QTest::newRow( "open " ) << "tests/8b-issue-2362.conf" << 0755 << 0022;
-    QTest::newRow( "weird" ) << "tests/8c-issue-2362.conf" << 0126 << 0651;
-    QTest::newRow( "rwxx " ) << "tests/8d-issue-2362.conf" << 0710 << 0067;
-    QTest::newRow( "-wrd " ) << "tests/8e-issue-2362.conf" << 0214 << 0563;
-    QTest::newRow( "bogus" ) << "tests/8f-issue-2362.conf" << -1 << -1;
-    QTest::newRow( "good2" ) << "tests/8g-issue-2362.conf" << 0750 << 0027;
-    QTest::newRow( "numrc" ) << "tests/8h-issue-2362.conf" << 0751 << 0026;
+    QTest::newRow( "good " ) << "tests/8a-issue-2362.conf" << 0700 << 0077 << QStringLiteral( "077" );
+    QTest::newRow( "open " ) << "tests/8b-issue-2362.conf" << 0755 << 0022 << QStringLiteral( "022" );
+    QTest::newRow( "weird" ) << "tests/8c-issue-2362.conf" << 0126 << 0651 << QStringLiteral( "651" );
+    QTest::newRow( "rwxx " ) << "tests/8d-issue-2362.conf" << 0710 << 0067 << QStringLiteral( "067" );
+    QTest::newRow( "-wrd " ) << "tests/8e-issue-2362.conf" << 0214 << 0563 << QStringLiteral( "563" );
+    QTest::newRow( "bogus" ) << "tests/8f-issue-2362.conf" << -1 << -1
+                             << QStringLiteral( "-01" );  // Bogus 3-character representation
+    QTest::newRow( "good2" ) << "tests/8g-issue-2362.conf" << 0750 << 0027 << QStringLiteral( "027" );
+    QTest::newRow( "numrc" ) << "tests/8h-issue-2362.conf" << 0751 << 0026 << QStringLiteral( "026" );
 }
 
 void
@@ -550,6 +552,7 @@ UserTests::testUserUmask()
     QFETCH( QString, filename );
     QFETCH( int, permission );
     QFETCH( int, umask );
+    QFETCH( QString, umask_string );
 
     // Checks that the test-data is valid
     if ( permission != -1 )
@@ -572,6 +575,8 @@ UserTests::testUserUmask()
 
     QCOMPARE( c.homePermissions(), permission );
     QCOMPARE( c.homeUMask(), umask );
+    // The QChar() is needed to disambiguate from the overload that takes a double
+    QCOMPARE( QStringLiteral( "%1" ).arg( umask, 3, 8, QChar( '0' ) ), umask_string );
 
     QCOMPARE( c.forbiddenLoginNames(), forbidden );
 }