diff --git a/src/MixERP.Net.VCards/Parser/TokenParser.cs b/src/MixERP.Net.VCards/Parser/TokenParser.cs
index d76bcaa..d910e6e 100644
--- a/src/MixERP.Net.VCards/Parser/TokenParser.cs
+++ b/src/MixERP.Net.VCards/Parser/TokenParser.cs
@@ -40,8 +40,10 @@ private static Dictionary<string, string> GetAdditionalKeyMembers(string data)
                 {
                     value = splitted[1].Trim('"').Trim('\'');
                 }
-
-                members.Add(key, value);
+                if (!members.ContainsKey(key))
+                {
+                    members.Add(key, value);
+                }
             }
 
             return members;
@@ -134,4 +136,4 @@ public static IEnumerable<Token> Parse(string contents)
             return tokens;
         }
     }
-}
\ No newline at end of file
+}