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-rw-r--r--swig/runtime.i1
1 files changed, 1 insertions, 0 deletions
diff --git a/swig/runtime.i b/swig/runtime.i
index bc2525e..43af044 100644
--- a/swig/runtime.i
+++ b/swig/runtime.i
@@ -31,6 +31,7 @@
#include <gnuradio/tags.hpp>
#include <gr_io_signature.h>
#include <gr_block.h>
+#include <gr_hier_block2.h>
#include <gr_message.h>
#include <gr_msg_handler.h>
#include <gr_msg_queue.h>