diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h
index b332059686c94f13f773cf3f8f872bec27732764..ef8d5ced6823da80d788d021e26a336b5c1a177c 100644
--- a/Kernel/API/Syscall.h
+++ b/Kernel/API/Syscall.h
@@ -427,7 +427,7 @@ struct SC_unveil_params {
 struct SC_waitid_params {
     int idtype;
     int id;
-    struct siginfo* infop;
+    Userspace<struct siginfo*> infop;
     int options;
 };
 
diff --git a/Kernel/Process.h b/Kernel/Process.h
index cae0cd9b244805e1abebf3c685e96a500aa3869f..d262cf2a5fc7b282a12bf7a97801976a6bff3656 100644
--- a/Kernel/Process.h
+++ b/Kernel/Process.h
@@ -222,7 +222,7 @@ public:
     int sys$kill(pid_t pid, int sig);
     [[noreturn]] void sys$exit(int status);
     int sys$sigreturn(RegisterState& registers);
-    pid_t sys$waitid(const Syscall::SC_waitid_params*);
+    pid_t sys$waitid(Userspace<const Syscall::SC_waitid_params*>);
     void* sys$mmap(const Syscall::SC_mmap_params*);
     int sys$munmap(void*, size_t size);
     int sys$set_mmap_name(const Syscall::SC_set_mmap_name_params*);
diff --git a/Kernel/Syscalls/waitid.cpp b/Kernel/Syscalls/waitid.cpp
index dd55a75b32d35031e7fcbd384f554d689ca17dbb..2650680b5f70db1090262364636b7f48caa52057 100644
--- a/Kernel/Syscalls/waitid.cpp
+++ b/Kernel/Syscalls/waitid.cpp
@@ -93,7 +93,7 @@ KResultOr<siginfo_t> Process::do_waitid(idtype_t idtype, int id, int options)
     }
 }
 
-pid_t Process::sys$waitid(const Syscall::SC_waitid_params* user_params)
+pid_t Process::sys$waitid(Userspace<const Syscall::SC_waitid_params*> user_params)
 {
     REQUIRE_PROMISE(proc);