1 files changed, 1 insertions, 1 deletions
diff --git a/gr-blocks/include/gnuradio/blocks/not_blk.h b/gr-blocks/include/gnuradio/blocks/not_blk.h
index 77a36a6765..f36c0f2b76 100644
--- a/gr-blocks/include/gnuradio/blocks/not_blk.h
+++ b/gr-blocks/include/gnuradio/blocks/not_blk.h
@@ -29,7 +29,7 @@ template <class T>
 class BLOCKS_API not_blk : virtual public sync_block
 {
 public:
-    typedef boost::shared_ptr<not_blk<T>> sptr;
+    typedef std::shared_ptr<not_blk<T>> sptr;
 
     static sptr make(size_t vlen = 1);
 };