diff --git a/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas b/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas
index 2b661c06f0..14d6a85576 100644
--- a/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas
+++ b/lcl/interfaces/gtk3/gtk3bindings/lazgtk3.pas
@@ -264,6 +264,14 @@ type
   GTK_TEXT_DIR_LTR = 1,
   GTK_TEXT_DIR_RTL = 2
   );
+  TGtkSelectionMode = (
+    TGtkSelectionModeMinValue = -$7FFFFFFF,
+    GTK_SELECTION_NONE = 0,
+    GTK_SELECTION_SINGLE = 1,
+    GTK_SELECTION_BROWSE = 2,
+    GTK_SELECTION_MULTIPLE = 3,
+    TGtkSelectionModeMaxValue = $7FFFFFFF
+  );
   TGtkPolicyType = (
     TGtkPolicyTypeMinValue = -$7FFFFFFF,
     GTK_POLICY_ALWAYS = 0,
@@ -907,15 +915,6 @@ const
   GTK_ICON_VIEW_DROP_ABOVE: TGtkIconViewDropPosition = 4;
   GTK_ICON_VIEW_DROP_BELOW: TGtkIconViewDropPosition = 5;
 
-type
-  TGtkSelectionMode = Integer;
-const
-  { GtkSelectionMode }
-  GTK_SELECTION_NONE: TGtkSelectionMode = 0;
-  GTK_SELECTION_SINGLE: TGtkSelectionMode = 1;
-  GTK_SELECTION_BROWSE: TGtkSelectionMode = 2;
-  GTK_SELECTION_MULTIPLE: TGtkSelectionMode = 3;
-
 type
   TGtkMessageType = Integer;
 const
diff --git a/lcl/interfaces/gtk3/gtk3wscomctrls.pp b/lcl/interfaces/gtk3/gtk3wscomctrls.pp
index 328190ea8f..2467aa479a 100644
--- a/lcl/interfaces/gtk3/gtk3wscomctrls.pp
+++ b/lcl/interfaces/gtk3/gtk3wscomctrls.pp
@@ -386,8 +386,8 @@ class procedure TGtk3WSCustomListView.SetPropertyInternal(
   const AIsSet: Boolean);
 const
   BoolToSelectionMode: array[Boolean] of TGtkSelectionMode = (
-    1 {GTK_SELECTION_SINGLE},
-    3 {GTK_SELECTION_MULTIPLE}
+    GTK_SELECTION_SINGLE {1} ,
+    GTK_SELECTION_MULTIPLE {3}
   );
 begin
   case AProp of