1 files changed, 1 insertions, 1 deletions
diff --git a/gnuradio-runtime/include/gnuradio/top_block.h b/gnuradio-runtime/include/gnuradio/top_block.h
index 5454aec035..fd8ab66a94 100644
--- a/gnuradio-runtime/include/gnuradio/top_block.h
+++ b/gnuradio-runtime/include/gnuradio/top_block.h
@@ -31,7 +31,7 @@ private:
     friend GR_RUNTIME_API top_block_sptr make_top_block(const std::string& name,
                                                         bool catch_exceptions);
 
-    top_block_impl* d_impl;
+    std::unique_ptr<top_block_impl> d_impl;
 
 protected:
     top_block(const std::string& name, bool catch_exceptions = true);