diff --git a/x86/realmode.c b/x86/realmode.c
index ef79f7e..301b013 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -115,6 +115,10 @@
 static void exit(int code)
 {
 	outb(code, 0xf4);
+
+	while (1) {
+		asm volatile("hlt" ::: "memory");
+	}
 }
 
 struct regs {