diff --git a/sources/editor/ui/dynamictextfieldeditor.cpp b/sources/editor/ui/dynamictextfieldeditor.cpp
index 47d87a91c..972de4176 100644
--- a/sources/editor/ui/dynamictextfieldeditor.cpp
+++ b/sources/editor/ui/dynamictextfieldeditor.cpp
@@ -157,7 +157,9 @@ void DynamicTextFieldEditor::updateForm()
 			m_color_kpb -> setColor(m_text_field.data() -> color());
 		}
 #endif
-		ui -> m_width_sb -> setValue(m_text_field.data() -> textWidth());
+			//Rounded as on_m_width_sb_editingFinished() compares it;
+			//setValue(int) would truncate 61.7 to 61
+		ui -> m_width_sb -> setValue(qRound(m_text_field.data() -> textWidth()));
 		ui -> m_font_pb -> setText(m_text_field -> font().family());
 
 		switch (m_text_field.data() -> textFrom()) {
@@ -363,7 +365,9 @@ void DynamicTextFieldEditor::on_m_width_sb_editingFinished()
 	qreal width = (qreal)ui -> m_width_sb -> value();
 
 	for (int i = 0; i < m_parts.length(); i++) {
-		if(width != m_parts[i] -> textWidth()) {
+			//The box shows whole pixels: a width fitted to the text is not
+			//rounded just by leaving the box.
+		if(ui -> m_width_sb -> value() != qRound(m_parts[i] -> textWidth())) {
 			QPropertyUndoCommand *undo = new QPropertyUndoCommand(m_parts[i], "textWidth", m_parts[i] -> textWidth(), width);
 			undo -> setText(tr("Modifier la largeur d'un texte"));
 			undoStack().push(undo);
diff --git a/sources/editor/ui/dynamictextfieldeditor.ui b/sources/editor/ui/dynamictextfieldeditor.ui
index 516b41853..59c8defde 100644
--- a/sources/editor/ui/dynamictextfieldeditor.ui
+++ b/sources/editor/ui/dynamictextfieldeditor.ui
@@ -101,11 +101,17 @@
    </item>
    <item row="4" column="1">
     <widget class="QSpinBox" name="m_width_sb">
+     <property name="specialValueText">
+      <string>Auto</string>
+     </property>
+     <property name="suffix">
+      <string>px</string>
+     </property>
      <property name="minimum">
       <number>-1</number>
      </property>
      <property name="maximum">
-      <number>500</number>
+      <number>10000</number>
      </property>
     </widget>
    </item>