diff --git a/addons/block_code/serialization/block_script_serialization.gd b/addons/block_code/serialization/block_script_serialization.gd
index 5f3051e3..d97ef98c 100644
--- a/addons/block_code/serialization/block_script_serialization.gd
+++ b/addons/block_code/serialization/block_script_serialization.gd
@@ -70,7 +70,7 @@ func instantiate_block(block_definition: BlockDefinition) -> Block:
 
 
 func instantiate_block_by_name(block_name: String) -> Block:
-	var block_definition := get_block_definition(block_name)
+	var block_definition := get_block_definition(block_name, {})
 
 	if block_definition == null:
 		push_warning("Cannot find a block definition for %s" % block_name)
@@ -79,24 +79,29 @@ func instantiate_block_by_name(block_name: String) -> Block:
 	return instantiate_block(block_definition)
 
 
-func get_block_definition(block_name: String) -> BlockDefinition:
+func get_block_definition(block_name: String, arguments: Dictionary) -> BlockDefinition:
 	var split := block_name.split(":", true, 1)
+	var block_definition: BlockDefinition
 
 	if len(split) > 1:
 		return _get_parameter_block_definition(split[0], split[1])
 
-	var block_definition = _get_base_block_definition(block_name)
+	block_definition = _get_base_block_definition(block_name)
+	if block_definition != null:
+		return block_definition
 
-	if block_definition == null:
-		# FIXME: This is a workaround for old-style output block references.
-		#        These were generated ahead of time using a block name that has
-		#        a "_" before the parameter name. Now, these parameter blocks
-		#        are generated on demand for any block name containing a ":".
-		#        Please remove this fallback when it is no longer necessary.
-		split = block_name.rsplit("_", true, 1)
-		return _get_parameter_block_definition(split[0], split[1])
+	var property_value = arguments.get("value", null)
+	block_definition = _get_obj_property_block_definition(block_name, property_value)
+	if block_definition != null:
+		return block_definition
 
-	return block_definition
+	# FIXME: This is a workaround for old-style output block references.
+	#        These were generated ahead of time using a block name that has
+	#        a "_" before the parameter name. Now, these parameter blocks
+	#        are generated on demand for any block name containing a ":".
+	#        Please remove this fallback when it is no longer necessary.
+	split = block_name.rsplit("_", true, 1)
+	return _get_parameter_block_definition(split[0], split[1])
 
 
 func _get_base_block_definition(block_name: String) -> BlockDefinition:
@@ -133,6 +138,29 @@ func _get_parameter_block_definition(block_name: String, parameter_name: String)
 	return block_definition
 
 
+func _get_obj_property_block_definition(block_name: String, property_value: Variant) -> BlockDefinition:
+	var property_name: String
+	var is_getter = true
+
+	if block_name.find("get_var_") == 0:
+		property_name = block_name.get_slice("get_var_", 1)
+	elif block_name.find("set_var_") == 0:
+		property_name = block_name.get_slice("set_var_", 1)
+		is_getter = false
+	else:
+		return null
+
+	var variable := VariableDefinition.new(property_name, typeof(property_value))
+	var block_definition: BlockDefinition
+
+	if is_getter:
+		block_definition = BlocksCatalog.get_variable_getter_block_definition(variable)
+	else:
+		block_definition = BlocksCatalog.get_variable_setter_block_definition(variable)
+
+	return block_definition
+
+
 func _update_block_definitions():
 	_available_blocks.clear()
 	_available_blocks.append_array(_get_inherited_block_definitions())
@@ -202,7 +230,6 @@ func _tree_to_ast(tree: BlockSerializationTree) -> BlockAST:
 
 func _block_to_ast_node(node: BlockSerialization) -> BlockAST.ASTNode:
 	var ast_node := BlockAST.ASTNode.new()
-	ast_node.data = get_block_definition(node.name)
 
 	for arg_name in node.arguments:
 		var argument = node.arguments[arg_name]
@@ -210,6 +237,8 @@ func _block_to_ast_node(node: BlockSerialization) -> BlockAST.ASTNode:
 			argument = _value_to_ast_value(argument)
 		ast_node.arguments[arg_name] = argument
 
+	ast_node.data = get_block_definition(node.name, ast_node.arguments)
+
 	var children: Array[BlockAST.ASTNode]
 	for c in node.children:
 		children.append(_block_to_ast_node(c))
@@ -220,7 +249,6 @@ func _block_to_ast_node(node: BlockSerialization) -> BlockAST.ASTNode:
 
 func _value_to_ast_value(value_node: ValueBlockSerialization) -> BlockAST.ASTValueNode:
 	var ast_value_node := BlockAST.ASTValueNode.new()
-	ast_value_node.data = get_block_definition(value_node.name)
 
 	for arg_name in value_node.arguments:
 		var argument = value_node.arguments[arg_name]
@@ -228,6 +256,8 @@ func _value_to_ast_value(value_node: ValueBlockSerialization) -> BlockAST.ASTVal
 			argument = _value_to_ast_value(argument)
 		ast_value_node.arguments[arg_name] = argument
 
+	ast_value_node.data = get_block_definition(value_node.name, value_node.arguments)
+
 	return ast_value_node