diff --git a/.testing/tools/parse_perf.py b/.testing/tools/parse_perf.py
index 76c6be5bcb..efcfa13b4f 100755
--- a/.testing/tools/parse_perf.py
+++ b/.testing/tools/parse_perf.py
@@ -102,7 +102,7 @@ def parse_perf_report(perf_data_path):
 
                     if tok == '>':
                         bracks -= 1
-                    if tok == '(':
+                    if tok == ')':
                         parens -= 1
 
                 # Strip any whitespace tokens