diff --git a/src/gui/editorwidgets/qgsvaluemapconfigdlg.cpp b/src/gui/editorwidgets/qgsvaluemapconfigdlg.cpp
index 8d6c1ae5b4b5..16ae2ce09221 100644
--- a/src/gui/editorwidgets/qgsvaluemapconfigdlg.cpp
+++ b/src/gui/editorwidgets/qgsvaluemapconfigdlg.cpp
@@ -387,7 +387,9 @@ void QgsValueMapConfigDlg::loadMapFromCSV( const QString &filePath )
   }
 
   QTextStream s( &f );
-  s.setAutoDetectUnicode( true );
+#if QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 )
+  s.setCodec( "UTF-8" );
+#endif
 
   const thread_local QRegularExpression re( "(?:^\"|[;,]\")(\"\"|[\\w\\W]*?)(?=\"[;,]|\"$)|(?:^(?!\")|[;,](?!\"))([^;,]*?)(?=$|[;,])|(\\r\\n|\\n)" );
   QList<QPair<QString, QVariant>> map;
@@ -402,11 +404,11 @@ void QgsValueMapConfigDlg::loadMapFromCSV( const QString &filePath )
       ceils << match.capturedTexts().last().trimmed().replace( QLatin1String( "\"\"" ), QLatin1String( "\"" ) );
     }
 
-    if ( ceils.size() != 2 )
+    if ( ceils.size() == 0 )
       continue;
 
     QString key = ceils[0];
-    QString val = ceils[1];
+    QString val = ceils.size() == 2 ? ceils[1] : QString( "" );
     if ( key == QgsApplication::nullRepresentation() )
       key = QgsValueMapFieldFormatter::NULL_VALUE;
     map.append( qMakePair( key, val ) );
diff --git a/tests/src/gui/testqgsvaluemapconfigdlg.cpp b/tests/src/gui/testqgsvaluemapconfigdlg.cpp
index 38c4a7dd8357..f87a4c30f029 100644
--- a/tests/src/gui/testqgsvaluemapconfigdlg.cpp
+++ b/tests/src/gui/testqgsvaluemapconfigdlg.cpp
@@ -36,6 +36,8 @@ class TestQgsValueMapConfigDlg : public QObject
     void cleanup();         // will be called after every testfunction.
 
     void testLoadFromCSV();
+    void testLoadFromCSVSingleColumn();
+    void testLoadFromCSVUTF8();
 };
 
 void TestQgsValueMapConfigDlg::initTestCase()
@@ -86,5 +88,59 @@ void TestQgsValueMapConfigDlg::testLoadFromCSV()
   delete valueMapConfig;
 }
 
+void TestQgsValueMapConfigDlg::testLoadFromCSVSingleColumn()
+{
+  const QString dataDir( TEST_DATA_DIR );
+  QgsVectorLayer vl( QStringLiteral( "LineString?crs=epsg:3111&field=pk:int&field=name:string" ), QStringLiteral( "vl1" ), QStringLiteral( "memory" ) );
+
+  QList<QVariant> valueList;
+  QVariantMap value;
+  value.insert( QStringLiteral( "Basic unquoted record" ), QString( "" ) );
+  valueList << value;
+  value.clear();
+  value.insert( QStringLiteral( "Forest type" ), QString( "" ) );
+  valueList << value;
+  value.clear();
+  value.insert( QStringLiteral( "So-called \"data\"" ), QString( "" ) );
+  valueList << value;
+  value.clear();
+  value.insert( QStringLiteral( "444" ), QString( "" ) );
+  valueList << value;
+  value.clear();
+  value.insert( QStringLiteral( "five" ), QString( "" ) );
+  valueList << value;
+
+  QgsValueMapConfigDlg *valueMapConfig = static_cast<QgsValueMapConfigDlg *>( QgsGui::editorWidgetRegistry()->createConfigWidget( QStringLiteral( "ValueMap" ), &vl, 1, nullptr ) );
+  valueMapConfig->loadMapFromCSV( dataDir + QStringLiteral( "/valuemapsample1col1.csv" ) );
+  QCOMPARE( valueMapConfig->config().value( QStringLiteral( "map" ) ).toList(), valueList );
+
+  valueMapConfig->loadMapFromCSV( dataDir + QStringLiteral( "/valuemapsample1col2.csv" ) );
+  QCOMPARE( valueMapConfig->config().value( QStringLiteral( "map" ) ).toList(), valueList );
+  delete valueMapConfig;
+}
+
+void TestQgsValueMapConfigDlg::testLoadFromCSVUTF8()
+{
+  const QString dataDir( TEST_DATA_DIR );
+  QgsVectorLayer vl( QStringLiteral( "LineString?crs=epsg:3111&field=pk:int&field=name:string" ), QStringLiteral( "vl1" ), QStringLiteral( "memory" ) );
+
+  QList<QVariant> valueList;
+  QVariantMap value;
+  value.insert( QStringLiteral( "char è" ), QString( "1" ) );
+  valueList << value;
+  value.clear();
+  value.insert( QStringLiteral( "char Ü" ), QString( "2" ) );
+  valueList << value;
+  value.clear();
+  value.insert( QStringLiteral( "char Σ" ), QString( "3" ) );
+  valueList << value;
+  value.clear();
+
+  QgsValueMapConfigDlg *valueMapConfig = static_cast<QgsValueMapConfigDlg *>( QgsGui::editorWidgetRegistry()->createConfigWidget( QStringLiteral( "ValueMap" ), &vl, 1, nullptr ) );
+  valueMapConfig->loadMapFromCSV( dataDir + QStringLiteral( "/valuemapsampleutf8.csv" ) );
+  QCOMPARE( valueMapConfig->config().value( QStringLiteral( "map" ) ).toList(), valueList );
+  delete valueMapConfig;
+}
+
 QGSTEST_MAIN( TestQgsValueMapConfigDlg )
 #include "testqgsvaluemapconfigdlg.moc"
diff --git a/tests/testdata/valuemapsample1col1.csv b/tests/testdata/valuemapsample1col1.csv
new file mode 100644
index 000000000000..6cbbded4bd72
--- /dev/null
+++ b/tests/testdata/valuemapsample1col1.csv
@@ -0,0 +1,5 @@
+1,
+2,
+three,
+4,
+5,
diff --git a/tests/testdata/valuemapsample1col2.csv b/tests/testdata/valuemapsample1col2.csv
new file mode 100644
index 000000000000..c4fcee863777
--- /dev/null
+++ b/tests/testdata/valuemapsample1col2.csv
@@ -0,0 +1,5 @@
+1
+2
+three
+4
+5
diff --git a/tests/testdata/valuemapsampleutf8.csv b/tests/testdata/valuemapsampleutf8.csv
new file mode 100644
index 000000000000..60e6c620976a
--- /dev/null
+++ b/tests/testdata/valuemapsampleutf8.csv
@@ -0,0 +1,3 @@
+1,char è
+2,char Ü
+3,char Σ