diff --git a/tasks/build.py b/tasks/build.py
index e6f493b9..e35b3044 100644
--- a/tasks/build.py
+++ b/tasks/build.py
@@ -794,7 +794,7 @@ def request_bot_build_issue_comments(repo_name, pr_number):
                 first_line = comment['body'].split('\n')[0]
                 arch_map = get_architecture_targets(cfg)
                 for arch in arch_map.keys():
-                    target_arch = '/'.join(arch.split('/')[-1:])
+                    target_arch = '/'.join(arch.split('/')[-1])
                     if target_arch in first_line:
                         status_table['arch'].append(target_arch)