1 files changed, 3 insertions, 2 deletions
diff --git a/gnuradio-runtime/include/gnuradio/top_block.h b/gnuradio-runtime/include/gnuradio/top_block.h
index fd8ab66a94..12051e6f04 100644
--- a/gnuradio-runtime/include/gnuradio/top_block.h
+++ b/gnuradio-runtime/include/gnuradio/top_block.h
@@ -28,8 +28,9 @@ GR_RUNTIME_API top_block_sptr make_top_block(const std::string& name,
 class GR_RUNTIME_API top_block : public hier_block2
 {
 private:
-    friend GR_RUNTIME_API top_block_sptr make_top_block(const std::string& name,
-                                                        bool catch_exceptions);
+    template <typename T, typename... Args>
+    friend std::shared_ptr<T> gnuradio::make_block_sptr(Args&&... args);
+
 
     std::unique_ptr<top_block_impl> d_impl;