diff --git a/Kernel/Process.h b/Kernel/Process.h
index 1583133f37c..23f2c24b5a4 100644
--- a/Kernel/Process.h
+++ b/Kernel/Process.h
@@ -261,7 +261,7 @@ public:
     int sys$dup(int oldfd);
     int sys$dup2(int oldfd, int newfd);
     int sys$sigaction(int signum, const sigaction* act, sigaction* old_act);
-    int sys$sigprocmask(int how, const sigset_t* set, sigset_t* old_set);
+    int sys$sigprocmask(int how, Userspace<const sigset_t*> set, Userspace<sigset_t*> old_set);
     int sys$sigpending(sigset_t*);
     int sys$getgroups(ssize_t, Userspace<gid_t*>);
     int sys$setgroups(ssize_t, Userspace<const gid_t*>);
diff --git a/Kernel/Syscalls/sigaction.cpp b/Kernel/Syscalls/sigaction.cpp
index c0d2b697c27..26a28c83eea 100644
--- a/Kernel/Syscalls/sigaction.cpp
+++ b/Kernel/Syscalls/sigaction.cpp
@@ -28,7 +28,7 @@
 
 namespace Kernel {
 
-int Process::sys$sigprocmask(int how, const sigset_t* set, sigset_t* old_set)
+int Process::sys$sigprocmask(int how, Userspace<const sigset_t*> set, Userspace<sigset_t*> old_set)
 {
     REQUIRE_PROMISE(sigaction);
     auto current_thread = Thread::current();