diff --git a/Source/Core/Windows/ThingBrowser2Form.cs b/Source/Core/Windows/ThingBrowser2Form.cs
index a6f76c7..c6ebacf 100644
--- a/Source/Core/Windows/ThingBrowser2Form.cs
+++ b/Source/Core/Windows/ThingBrowser2Form.cs
@@ -128,7 +128,7 @@ namespace CodeImp.DoomBuilder.Windows
             // Flags
             ThingTypeInfo ti = General.Map.Data.GetThingInfoEx(s_thingType);
             IDictionary<string, string> newFlags = (ti == null || ti.Flags.Count == 0) ? General.Map.Config.ThingFlags : ti.Flags;
-            flags.UpdateCheckboxes(newFlags);
+            flags.UpdateCheckboxes(newFlags, General.Map.Config.ThingFlags);
             anglelabel.Text = (ti == null) ? "Angle:" : ti.AngleText + ":";
             flagsvallabel.Text = (ti == null) ? "Flags value:" : ti.FlagsValueText + ":";
             foreach (CheckBox c in flags.Checkboxes)
@@ -142,7 +142,7 @@ namespace CodeImp.DoomBuilder.Windows
             posZ.AllowNegative = General.Map.FormatInterface.MinThingHeight < 0;
 
             // Update...
-            flags.UpdateCheckboxes(newFlags);
+            flags.UpdateCheckboxes(newFlags, General.Map.Config.ThingFlags);
             if (ti != null)
             {
                 flagsvallabel.Text = ti.FlagsValueText + ":";
@@ -318,7 +318,7 @@ namespace CodeImp.DoomBuilder.Windows
 				return;
 
             IDictionary<string, string> newFlags = (thinginfo == null || thinginfo.Flags.Count == 0) ? General.Map.Config.ThingFlags : thinginfo.Flags;
-            flags.UpdateCheckboxes(newFlags);
+            flags.UpdateCheckboxes(newFlags, General.Map.Config.ThingFlags);
             anglelabel.Text = (thinginfo == null) ? "Angle:" : thinginfo.AngleText + ":";
             flagsvallabel.Text = (thinginfo == null) ? "Flags value:" : thinginfo.FlagsValueText + ":";
 		}