2 files changed, 7 insertions, 0 deletions
diff --git a/grc/core/generator/cpp_hier_block.py b/grc/core/generator/cpp_hier_block.py
index c4d98e854b..5a17854226 100644
--- a/grc/core/generator/cpp_hier_block.py
+++ b/grc/core/generator/cpp_hier_block.py
@@ -124,6 +124,9 @@ class CppHierBlockGenerator(CppTopBlockGenerator):
             )
         else:
             t['make'] = '{cls}()'.format(cls=block_id)
+        # Self-connect if there aren't any ports
+        if not data['inputs'] and not data['outputs']:
+            t['make'] += '\nthis->connect(this->${id});'
 
         # Callback data
         t['callbacks'] = [
diff --git a/grc/core/generator/hier_block.py b/grc/core/generator/hier_block.py
index b56ed223c0..9c80271235 100644
--- a/grc/core/generator/hier_block.py
+++ b/grc/core/generator/hier_block.py
@@ -117,6 +117,10 @@ class HierBlockGenerator(TopBlockGenerator):
             )
         else:
             t['make'] = '{cls}()'.format(cls=block_id)
+        # Self-connect if there aren't any ports
+        if not data['inputs'] and not data['outputs']:
+            t['make'] += '\nself.connect(self.${id})'
+
         # Callback data
         t['callbacks'] = [
             'set_{key}(${{ {key} }})'.format(key=param_block.name) for param_block in parameters