diff --git a/sortix/syscall.cpp b/sortix/syscall.cpp
index 6f8a1368..09698464 100644
--- a/sortix/syscall.cpp
+++ b/sortix/syscall.cpp
@@ -83,6 +83,12 @@ namespace Sortix
 			Scheduler::Switch(regs);
 		}
 
+		void Yield()
+		{
+			Panic("Syscall::Yield() is not implemented because it caused "
+			      "instability and other issues.");
+		}
+
 		void AsIs()
 		{
 			system_was_incomplete = 1;
diff --git a/sortix/syscall.h b/sortix/syscall.h
index 70048aa5..e7fa5b6a 100644
--- a/sortix/syscall.h
+++ b/sortix/syscall.h
@@ -44,6 +44,11 @@ namespace Sortix
 		// that its return value shall be discarded.
 		void Incomplete();
 
+		// Call this prior to Incomplete() to signal that the scheduler should
+		// go run something else for a moment. The current thread will not be
+		// marked as blocking.
+		void Yield();
+
 		// For when you want the syscall exit code not to modify registers.
 		void AsIs();