1 files changed, 1 insertions, 1 deletions
diff --git a/gr-blocks/include/gnuradio/blocks/add_blk.h b/gr-blocks/include/gnuradio/blocks/add_blk.h
index 9ea552805f..6209dc8098 100644
--- a/gr-blocks/include/gnuradio/blocks/add_blk.h
+++ b/gr-blocks/include/gnuradio/blocks/add_blk.h
@@ -36,7 +36,7 @@ class BLOCKS_API add_blk : virtual public sync_block
 {
 public:
     // gr::blocks::add_blk::sptr
-    typedef boost::shared_ptr<add_blk<T>> sptr;
+    typedef std::shared_ptr<add_blk<T>> sptr;
 
     static sptr make(size_t vlen = 1);
 };