diff --git a/include/kernaux/drivers/shutdown.h b/include/kernaux/drivers/shutdown.h
index 73e4e3f..353bf8c 100644
--- a/include/kernaux/drivers/shutdown.h
+++ b/include/kernaux/drivers/shutdown.h
@@ -5,14 +5,6 @@
 extern "C" {
 #endif
 
-#include <stdbool.h>
-
-// TODO: make this cross-platform
-#define KERNAUX_DRIVERS_SHUTDOWN_INT 3
-#define KERNAUX_DRIVERS_SHUTDOWN_ASM "int $3"
-
-bool kernaux_drivers_shutdown_is_doing();
-
 __attribute__((noreturn))
 void kernaux_drivers_shutdown_halt();
 void kernaux_drivers_shutdown_poweroff();
diff --git a/src/drivers/shutdown.c b/src/drivers/shutdown.c
index 3a68e90..c25ad30 100644
--- a/src/drivers/shutdown.c
+++ b/src/drivers/shutdown.c
@@ -5,21 +5,11 @@
 #include <kernaux/drivers/shutdown.h>
 #include <kernaux/drivers/qemu.h>
 
-#include <stdbool.h>
-
-static bool is_doing = false;
-
-bool kernaux_drivers_shutdown_is_doing()
-{
-    return is_doing;
-}
-
 void kernaux_drivers_shutdown_halt()
 {
-    is_doing = true;
-
 #ifdef ASM_X86
-    for (;;) __asm__ __volatile__(KERNAUX_DRIVERS_SHUTDOWN_ASM);
+    // Disable interrupts
+    __asm__ __volatile__("cli");
 #endif
 
     volatile int x = 0;
@@ -28,8 +18,6 @@ void kernaux_drivers_shutdown_halt()
 
 void kernaux_drivers_shutdown_poweroff()
 {
-    is_doing = true;
-
     kernaux_drivers_qemu_poweroff();
 
     // If we can't poweroff then we halt