diff --git a/src/gui/qgsattributeform.cpp b/src/gui/qgsattributeform.cpp
index 31b4188b3f0..57910adaaf4 100644
--- a/src/gui/qgsattributeform.cpp
+++ b/src/gui/qgsattributeform.cpp
@@ -901,7 +901,7 @@ void QgsAttributeForm::onConstraintStatusChanged( const QString& constraint,
     if ( !ok )
     {
       // not good
-      buddy->setText( QStringLiteral( "%1<font color=\"red\">❌</font>" ).arg( text ) );
+      buddy->setText( QStringLiteral( "%1<font color=\"red\">✘</font>" ).arg( text ) );
     }
     else
     {
diff --git a/tests/src/gui/testqgsattributeform.cpp b/tests/src/gui/testqgsattributeform.cpp
index 2dd008c780b..c8f07ada49d 100644
--- a/tests/src/gui/testqgsattributeform.cpp
+++ b/tests/src/gui/testqgsattributeform.cpp
@@ -79,7 +79,7 @@ void TestQgsAttributeForm::testFieldConstraint()
 
   // testing stuff
   QString validLabel = QStringLiteral( "col0<font color=\"green\">✔</font>" );
-  QString invalidLabel = QStringLiteral( "col0<font color=\"red\">❌</font>" );
+  QString invalidLabel = QStringLiteral( "col0<font color=\"red\">✘</font>" );
 
   // set constraint
   layer->setConstraintExpression( 0, QString() );
@@ -145,7 +145,7 @@ void TestQgsAttributeForm::testFieldMultiConstraints()
   // testing stuff
   QSignalSpy spy( &form, SIGNAL( attributeChanged( QString, QVariant ) ) );
   QString val = QStringLiteral( "<font color=\"green\">✔</font>" );
-  QString inv = QStringLiteral( "<font color=\"red\">❌</font>" );
+  QString inv = QStringLiteral( "<font color=\"red\">✘</font>" );
 
   // get wrappers for each widget
   QgsEditorWidgetWrapper *ww0, *ww1, *ww2, *ww3;