diff --git a/OpenTok/Util/TokenGenerator.cs b/OpenTok/Util/TokenGenerator.cs
index 752bb5c..3c5a4d9 100644
--- a/OpenTok/Util/TokenGenerator.cs
+++ b/OpenTok/Util/TokenGenerator.cs
@@ -97,7 +97,7 @@ internal Dictionary<string, object> GeneratePayload()
                 { "jti", GenerateTokenId() },
                 { "initial_layout_list", string.Join(" ", InitialLayoutClasses) },
                 { "nonce", OpenTokUtils.GetRandomNumber() },
-                { "data", this.Data },
+                { "connection_data", this.Data },
             };
 
             return payload;
@@ -124,4 +124,4 @@ internal SigningCredentials GenerateCredentials()
             return new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha256);
         }
     }
-}
\ No newline at end of file
+}