diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index 4134eb0cc2..708e547e83 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -66,7 +66,7 @@ enum class NeedsBigProcessLock {
     S(create_thread, NeedsBigProcessLock::Yes)              \
     S(dbgputstr, NeedsBigProcessLock::No)                   \
     S(detach_thread, NeedsBigProcessLock::Yes)              \
-    S(disown, NeedsBigProcessLock::Yes)                     \
+    S(disown, NeedsBigProcessLock::No)                      \
     S(dump_backtrace, NeedsBigProcessLock::No)              \
     S(dup2, NeedsBigProcessLock::No)                        \
     S(emuctl, NeedsBigProcessLock::No)                      \
diff --git a/Kernel/Syscalls/disown.cpp b/Kernel/Syscalls/disown.cpp
index 0be9c99ef2..685f2de69f 100644
--- a/Kernel/Syscalls/disown.cpp
+++ b/Kernel/Syscalls/disown.cpp
@@ -10,16 +10,17 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$disown(ProcessID pid)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     TRY(require_promise(Pledge::proc));
     auto process = Process::from_pid_in_same_jail(pid);
     if (!process)
         return ESRCH;
-    if (process->ppid() != this->pid())
-        return ECHILD;
-    process->with_mutable_protected_data([](auto& protected_data) {
+    TRY(process->with_mutable_protected_data([this](auto& protected_data) -> ErrorOr<void> {
+        if (protected_data.ppid != this->pid())
+            return ECHILD;
         protected_data.ppid = 0;
-    });
+        return {};
+    }));
     process->disowned_by_waiter(*this);
     return 0;
 }