diff --git a/DocxTemplater/DynamicTable.cs b/DocxTemplater/DynamicTable.cs
index 02d92d0..0e3456a 100644
--- a/DocxTemplater/DynamicTable.cs
+++ b/DocxTemplater/DynamicTable.cs
@@ -5,13 +5,15 @@ namespace DocxTemplater
 {
     public class DynamicTable : IDynamicTable
     {
+        private readonly IEqualityComparer<object> m_headerComparer;
         private readonly List<Dictionary<object, object>> m_rows;
-        public IEnumerable<object> Headers => m_rows.SelectMany(x => x.Keys).Distinct().ToList();
+        public IEnumerable<object> Headers => m_rows.SelectMany(x => x.Keys).Distinct(m_headerComparer).ToList();
 
         public IEnumerable<IEnumerable<object>> Rows => m_rows.Select(x => x.Values.ToList()).ToList();
 
-        public DynamicTable()
+        public DynamicTable(IEqualityComparer<object> headerComparer = null)
         {
+            m_headerComparer = headerComparer ?? EqualityComparer<object>.Default;
             m_rows = new List<Dictionary<object, object>>();
         }