diff --git a/lcl/interfaces/qt/qtwscomctrls.pp b/lcl/interfaces/qt/qtwscomctrls.pp
index 79bb5deeb4..eecf6688d2 100644
--- a/lcl/interfaces/qt/qtwscomctrls.pp
+++ b/lcl/interfaces/qt/qtwscomctrls.pp
@@ -1728,7 +1728,7 @@ begin
     end;
 
     ChkBoxRect := Rect(0, 0, 0, 0);
-    if QtTreeWidget.Checkable then
+    if QtTreeWidget.Checkable and (ASubItem = 0) then
     begin
       APixelMetric := QStyle_pixelMetric(QApplication_style(), QStylePM_IndicatorWidth, nil, QtTreeWidget.Widget);
       APixelMetric += QStyle_pixelMetric(QApplication_style(), QStylePM_CheckBoxLabelSpacing, nil, QtTreeWidget.Widget);
diff --git a/lcl/interfaces/qt5/qtwscomctrls.pp b/lcl/interfaces/qt5/qtwscomctrls.pp
index 3f66dadf19..ea53bd5f76 100644
--- a/lcl/interfaces/qt5/qtwscomctrls.pp
+++ b/lcl/interfaces/qt5/qtwscomctrls.pp
@@ -1800,7 +1800,7 @@ begin
     end;
 
     ChkBoxRect := Rect(0, 0, 0, 0);
-    if QtTreeWidget.Checkable then
+    if QtTreeWidget.Checkable and (ASubItem = 0) then
     begin
       APixelMetric := QStyle_pixelMetric(QApplication_style(), QStylePM_IndicatorWidth, nil, QtTreeWidget.Widget);
       APixelMetric += QStyle_pixelMetric(QApplication_style(), QStylePM_CheckBoxLabelSpacing, nil, QtTreeWidget.Widget);
diff --git a/lcl/interfaces/qt6/qtwscomctrls.pp b/lcl/interfaces/qt6/qtwscomctrls.pp
index c882b48112..2990f6bc0e 100644
--- a/lcl/interfaces/qt6/qtwscomctrls.pp
+++ b/lcl/interfaces/qt6/qtwscomctrls.pp
@@ -1799,7 +1799,7 @@ begin
     end;
 
     ChkBoxRect := Rect(0, 0, 0, 0);
-    if QtTreeWidget.Checkable then
+    if QtTreeWidget.Checkable and (ASubItem = 0) then
     begin
       APixelMetric := QStyle_pixelMetric(QApplication_style(), QStylePM_IndicatorWidth, nil, QtTreeWidget.Widget);
       APixelMetric += QStyle_pixelMetric(QApplication_style(), QStylePM_CheckBoxLabelSpacing, nil, QtTreeWidget.Widget);