diff --git a/aiocraft/mc/types.py b/aiocraft/mc/types.py
index 4b56bee..b1c0f0d 100644
--- a/aiocraft/mc/types.py
+++ b/aiocraft/mc/types.py
@@ -20,6 +20,17 @@ class Type(object):
 		"""Check if this type exists in this context"""
 		return True
 
+class VoidType(Type):
+	pytype : type = type(None)
+
+	def write(self, v:None, buffer:io.BytesIO, ctx:object=None):
+		pass
+
+	def read(self, buffer:io.BytesIO, ctx:object=None) -> None:
+		return None
+
+Void = VoidType()
+
 class UnimplementedDataType(Type):
 	pytype : type = bytes
 
diff --git a/compiler/proto.py b/compiler/proto.py
index fdae4b3..941e5fe 100644
--- a/compiler/proto.py
+++ b/compiler/proto.py
@@ -72,6 +72,7 @@ TYPE_MAP = {
 	"position": Ref('Position'),
 	"entityMetadataItem": Ref('EntityMetadataItem'),
 	"entityMetadata": Ref('EntityMetadata'),
+	"void": Ref('Void'),
 }
 
 HINT_MAP = {
@@ -138,6 +139,8 @@ def mctype(slot_type:Any) -> Ref:
 				v["default"] if "default" in v and v['default'] != 'void' else None,
 			)
 			# return SwitchType(mctype(v)) # TODO
+		elif t == "bitfield":
+			return Ref('Int')
 		# elif t == "mapper": # ????
 		# 	return TrailingData
 		else: