diff --git a/gdbserver/netbsd-low.cc b/gdbserver/netbsd-low.cc
index 9e7314b02a9..0c75f4ba6a4 100644
--- a/gdbserver/netbsd-low.cc
+++ b/gdbserver/netbsd-low.cc
@@ -453,7 +453,10 @@ netbsd_process_target::detach (process_info *process)
 void
 netbsd_process_target::mourn (struct process_info *proc)
 {
-  proc->for_each_thread (remove_thread);
+  proc->for_each_thread ([proc] (thread_info *thread)
+    {
+      proc->remove_thread (thread);
+    });
 
   remove_process (proc);
 }