diff --git a/td/generate/tl_writer_c.h b/td/generate/tl_writer_c.h
index e31bc969c..a85f00c0d 100644
--- a/td/generate/tl_writer_c.h
+++ b/td/generate/tl_writer_c.h
@@ -242,7 +242,7 @@ class TlWriterCCommon final : public tl::TL_writer {
              "TDC_VECTOR(Int,int)\n"
              "TDC_VECTOR(Long,long long)\n"
              "TDC_VECTOR(String,char *)\n"
-             "TDC_VECTOR(Bytes,TdBytes)\n"
+             "TDC_VECTOR(Bytes,struct TdBytes)\n"
              "struct TdStackStorerMethods {\n"
              "  void (*pack_string)(const char *s);\n"
              "  void (*pack_bytes)(const unsigned char *s, int len);\n"
diff --git a/td/telegram/td_c_client.h b/td/telegram/td_c_client.h
index a8310a210..26f88cb68 100644
--- a/td/telegram/td_c_client.h
+++ b/td/telegram/td_c_client.h
@@ -19,22 +19,22 @@ struct TdBytes TdCreateObjectBytes(unsigned char *data, int len);
 
 struct TdRequest {
   long long request_id;
-  TdFunction *function;
+  struct TdFunction *function;
 };
 
 struct TdResponse {
   long long request_id;
   int client_id;
-  TdObject *object;
+  struct TdObject *object;
 };
 
 int TdCClientCreateId();
 
 void TdCClientSend(int client_id, struct TdRequest request);
 
-TdResponse TdCClientReceive(double timeout);
+struct TdResponse TdCClientReceive(double timeout);
 
-TdObject *TdCClientExecute(TdFunction *function);
+struct TdObject *TdCClientExecute(struct TdFunction *function);
 
 #ifdef __cplusplus
 }