diff --git a/pkNX.WinForms/Controls/EvolutionRow.Designer.cs b/pkNX.WinForms/Controls/EvolutionRow.Designer.cs
index faeacb0c..c8f3c4db 100644
--- a/pkNX.WinForms/Controls/EvolutionRow.Designer.cs
+++ b/pkNX.WinForms/Controls/EvolutionRow.Designer.cs
@@ -100,6 +100,7 @@ private void InitializeComponent()
             this.CB_Arg.Name = "CB_Arg";
             this.CB_Arg.Size = new System.Drawing.Size(82, 21);
             this.CB_Arg.TabIndex = 69;
+            this.CB_Arg.Visible = false;
             // 
             // CB_Species
             // 
diff --git a/pkNX.WinForms/Controls/EvolutionRow.cs b/pkNX.WinForms/Controls/EvolutionRow.cs
index fe27f42d..d0532078 100644
--- a/pkNX.WinForms/Controls/EvolutionRow.cs
+++ b/pkNX.WinForms/Controls/EvolutionRow.cs
@@ -23,14 +23,12 @@ public EvolutionRow()
             {
                 var index = (EvolutionType)CB_Method.SelectedIndex;
                 var type = index.GetArgType();
+                CB_Arg.Visible = type >= EvolutionTypeArgumentType.Items;
                 if (type == oldMethod)
                     return;
 
                 if (type < EvolutionTypeArgumentType.Items)
-                {
-                    CB_Arg.Visible = false;
                     return;
-                }
 
                 CB_Arg.Visible = true;
                 oldMethod = type;