diff --git a/tools/GlyphFieldsGenerator/GlyphFieldsFontAwesome5Pro/Program.cs b/tools/GlyphFieldsGenerator/GlyphFieldsFontAwesome5Pro/Program.cs
index 73d375e..aa5f3c4 100644
--- a/tools/GlyphFieldsGenerator/GlyphFieldsFontAwesome5Pro/Program.cs
+++ b/tools/GlyphFieldsGenerator/GlyphFieldsFontAwesome5Pro/Program.cs
@@ -32,13 +32,13 @@ private static void Main(string[] args)
                     var originalLabel = iconDuotone.Label;
                     iconDuotone.Label = $"{originalLabel}-primary";
 
-                    iconDuotoneSecondaryList.Add(
-                        new Icon
-                        {
-                            IconType = iconDuotone.IconType,
-                            Label = $"{originalLabel}-secondary",
-                            Unicode = $"10{iconDuotone.Unicode}"
-                        });
+                    iconDuotoneSecondaryList.Add(new Icon
+                    {
+                        IconType = iconDuotone.IconType,
+                        Label = $"{originalLabel}-secondary",
+                        UnicodeNumber = int.Parse($"0010{iconDuotone.Unicode}",
+                            System.Globalization.NumberStyles.HexNumber),
+                    });
                 }
 
                 iconList.AddRange(iconDuotoneSecondaryList);
diff --git a/tools/GlyphFieldsGenerator/GlyphFieldsGenerator/GlyphField.cs b/tools/GlyphFieldsGenerator/GlyphFieldsGenerator/GlyphField.cs
index 56831b1..b6e853c 100644
--- a/tools/GlyphFieldsGenerator/GlyphFieldsGenerator/GlyphField.cs
+++ b/tools/GlyphFieldsGenerator/GlyphFieldsGenerator/GlyphField.cs
@@ -8,6 +8,8 @@ public abstract class GlyphField
 
         public virtual string Unicode { get; set; }
 
+        public int? UnicodeNumber { get; set; }
+
         protected virtual string FontFamily { get; }
 
         protected virtual string Glyph => $"\"\\u{Unicode}\"";
@@ -33,7 +35,9 @@ protected virtual string GlyphPropertyName
 
         public override string ToString()
         {
-            return $"        public static readonly GlyphInfo {GlyphPropertyName} = new GlyphInfo {{ Name = {GlyphName}, Glyph = {Glyph}, FontFamily = {FontFamily} }};";
+            return UnicodeNumber.HasValue
+                ? $"        public static readonly GlyphInfo {GlyphPropertyName} = new GlyphInfo {{ Name = {GlyphName}, UnicodeNumber = {UnicodeNumber}, FontFamily = {FontFamily} }};"
+                : $"        public static readonly GlyphInfo {GlyphPropertyName} = new GlyphInfo {{ Name = {GlyphName}, Glyph = {Glyph}, FontFamily = {FontFamily} }};";
         }
     }
 }
\ No newline at end of file