diff --git a/src/Client.cs b/src/Client.cs
index f6021f4..5a9dbb6 100644
--- a/src/Client.cs
+++ b/src/Client.cs
@@ -699,18 +699,26 @@ namespace WTelegram
 			object result;
 			if (tcs != null)
 			{
-				if (!type.IsArray)
-					result = reader.ReadTLValue(type);
-				else if (reader.ReadUInt32() == Layer.RpcErrorCtor)
-					result = reader.ReadTLObject(Layer.RpcErrorCtor);
-				else
+				try
 				{
-					reader.BaseStream.Position -= 4;
-					result = reader.ReadTLValue(type);
+					if (!type.IsArray)
+						result = reader.ReadTLValue(type);
+					else if (reader.ReadUInt32() == Layer.RpcErrorCtor)
+						result = reader.ReadTLObject(Layer.RpcErrorCtor);
+					else
+					{
+						reader.BaseStream.Position -= 4;
+						result = reader.ReadTLValue(type);
+					}
+					if (type.IsEnum) result = Enum.ToObject(type, result);
+					Log(1, "");
+					tcs.SetResult(result);
+				}
+				catch (Exception ex)
+				{
+					tcs.SetException(ex);
+					throw;
 				}
-				if (type.IsEnum) result = Enum.ToObject(type, result);
-				Log(1, "");
-				tcs.SetResult(result);
 			}
 			else
 			{
diff --git a/src/TL.cs b/src/TL.cs
index 2d49f30..26f1fcd 100644
--- a/src/TL.cs
+++ b/src/TL.cs
@@ -130,6 +130,7 @@ namespace TL
 					{
 						0x997275b5 => true,
 						0xbc799737 => false,
+						Layer.RpcErrorCtor => reader.ReadTLObject(Layer.RpcErrorCtor),
 						var value => throw new ApplicationException($"Invalid boolean value #{value:x}")
 					};
 				case TypeCode.Object: