diff --git a/src/west/app/project.py b/src/west/app/project.py
index 95c6af4..4638b19 100644
--- a/src/west/app/project.py
+++ b/src/west/app/project.py
@@ -859,7 +859,7 @@ class Update(_ProjectCommand):
 
     @staticmethod
     def _update_concurrent_thread(args):
-        index, project, self, logdir = args
+        project, self, logdir = args
         if logdir:
             saved_stdout = os.dup(sys.stdout.fileno())
             saved_stderr = os.dup(sys.stderr.fileno())
@@ -873,9 +873,9 @@ class Update(_ProjectCommand):
 
         try:
             self.update(project)
-            return (index, True)
+            return True
         except subprocess.CalledProcessError:
-            return (index, False)
+            return False
         finally:
             if logdir:
                 sys.stdout.flush()
@@ -903,12 +903,13 @@ class Update(_ProjectCommand):
             log.dbg(f"log directory: {logdir_name}")
 
         args = []
-        for index, project in enumerate(projects):
-            args.append((index, project, self, logdir_name))
+        for project in projects:
+            args.append((project, self, logdir_name))
 
         with multiprocessing.Pool(self.args.jobs) as p:
-            for index, successful in p.imap_unordered(
-                                     self._update_concurrent_thread, args):
+            for index, successful in enumerate(
+                    p.imap_unordered(self._update_concurrent_thread,
+                                     args)):
                 project = projects[index]
 
                 if logdir: