diff --git a/LiteDB/Client/Mapper/BsonMapper.cs b/LiteDB/Client/Mapper/BsonMapper.cs
index 8cc61e8ff..1b963f560 100644
--- a/LiteDB/Client/Mapper/BsonMapper.cs
+++ b/LiteDB/Client/Mapper/BsonMapper.cs
@@ -328,7 +328,8 @@ protected virtual EntityMapper BuildEntityMapper(Type type)
                 this.ResolveMember?.Invoke(type, memberInfo, member);
 
                 // test if has name and there is no duplicate field
-                if (member.FieldName != null && mapper.Members.Any(x => x.FieldName.Equals(name, StringComparison.OrdinalIgnoreCase)) == false)
+                // when member is not ignore
+                if (member.FieldName != null && mapper.Members.Any(x => x.FieldName.Equals(name, StringComparison.OrdinalIgnoreCase)) == false && !member.IsIgnore)
                 {
                     mapper.Members.Add(member);
                 }
diff --git a/LiteDB/Client/Mapper/MemberMapper.cs b/LiteDB/Client/Mapper/MemberMapper.cs
index fe648fb1e..0e199f9cb 100644
--- a/LiteDB/Client/Mapper/MemberMapper.cs
+++ b/LiteDB/Client/Mapper/MemberMapper.cs
@@ -63,5 +63,10 @@ public class MemberMapper
         /// When property is an array of items, gets underlying type (otherwise is same type of PropertyType)
         /// </summary>
         public Type UnderlyingType { get; set; }
+
+        /// <summary>
+        /// Is this property ignore
+        /// </summary>
+        public bool IsIgnore { get; set; }
     }
 }
\ No newline at end of file