diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index bf253f748f..397b6a7cba 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -65,7 +65,7 @@ enum class NeedsBigProcessLock {
     S(create_inode_watcher, NeedsBigProcessLock::No)       \
     S(create_thread, NeedsBigProcessLock::No)              \
     S(dbgputstr, NeedsBigProcessLock::No)                  \
-    S(detach_thread, NeedsBigProcessLock::Yes)             \
+    S(detach_thread, NeedsBigProcessLock::No)              \
     S(disown, NeedsBigProcessLock::No)                     \
     S(dump_backtrace, NeedsBigProcessLock::No)             \
     S(dup2, NeedsBigProcessLock::No)                       \
diff --git a/Kernel/Syscalls/thread.cpp b/Kernel/Syscalls/thread.cpp
index 457b52d519..0a317c49e7 100644
--- a/Kernel/Syscalls/thread.cpp
+++ b/Kernel/Syscalls/thread.cpp
@@ -125,7 +125,7 @@ void Process::sys$exit_thread(Userspace<void*> exit_value, Userspace<void*> stac
 
 ErrorOr<FlatPtr> Process::sys$detach_thread(pid_t tid)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::thread));
     auto thread = TRY(get_thread_from_thread_list(tid));
     if (!thread->is_joinable())