diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index c5061e9b21..a6bf2a0d7c 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -1138,7 +1138,6 @@ class PointerToBufferTypeBase(TypeInfo):
         self, field: descriptor.FieldDescriptorProto, needs_decode: bool
     ) -> None:
         super().__init__(field, needs_decode)
-        self.array_size = 0
 
     @property
     def wire_type(self) -> WireType: