diff --git a/hvcc/core/hv2ir/HLangAdc.py b/hvcc/core/hv2ir/HLangAdc.py
index df6057a..261e74d 100644
--- a/hvcc/core/hv2ir/HLangAdc.py
+++ b/hvcc/core/hv2ir/HLangAdc.py
@@ -35,7 +35,7 @@ def __init__(
         assert obj_type == "adc"
         super().__init__(obj_type, args, graph,
                          num_inlets=0,
-                         num_outlets=len(args[HeavyLangObject._HEAVY_LANG_DICT.root[obj_type].args[0].name]),
+                         num_outlets=len(args[self._HEAVY_LANG_DICT.root[obj_type].args[0].name]),
                          annotations=annotations)
 
     def _resolved_outlet_type(self, outlet_index: int = 0) -> str:
diff --git a/hvcc/core/hv2ir/HLangDac.py b/hvcc/core/hv2ir/HLangDac.py
index ce7b6f7..a4c02ec 100644
--- a/hvcc/core/hv2ir/HLangDac.py
+++ b/hvcc/core/hv2ir/HLangDac.py
@@ -33,7 +33,7 @@ def __init__(
     ) -> None:
         assert obj_type == "dac"
         super().__init__(obj_type, args, graph,
-                         num_inlets=len(args[HeavyLangObject._HEAVY_LANG_DICT.root[obj_type].args[0].name]),
+                         num_inlets=len(args[self._HEAVY_LANG_DICT.root[obj_type].args[0].name]),
                          num_outlets=0,
                          annotations=annotations)
 
diff --git a/hvcc/core/hv2ir/HLangSequence.py b/hvcc/core/hv2ir/HLangSequence.py
index e2a23ab..cc734f6 100644
--- a/hvcc/core/hv2ir/HLangSequence.py
+++ b/hvcc/core/hv2ir/HLangSequence.py
@@ -33,7 +33,7 @@ def __init__(
         annotations: Optional[Dict] = None
     ) -> None:
         # get the number of outlets that this object has
-        num_outlets = len(args[HeavyLangObject._HEAVY_LANG_DICT.root[obj_type].args[0].name])
+        num_outlets = len(args[self._HEAVY_LANG_DICT.root[obj_type].args[0].name])
         super().__init__(obj_type, args, graph,
                          num_inlets=1,
                          num_outlets=num_outlets,