diff --git a/gdb-port/top-level-parse.py b/gdb-port/top-level-parse.py
index 73d78a5fb11ba619a30f7d385653121eed182c9f..aa20216a35444e84dd7b99ad11e3265f849e51e8 100644
--- a/gdb-port/top-level-parse.py
+++ b/gdb-port/top-level-parse.py
@@ -267,7 +267,7 @@ class TopLevelParse:
 
 	# TODO: get_avg_mem_use_all_arenas, get_total_mem_use
 
-	def gather_allocations_in_parser_stacks():
+	def gather_allocations_in_parser_stacks(self):
 		pending_allocs_by_arena = {}
 
 		for ps in self.parser_stacks: