diff --git a/kernel-src/include/kernel/scheduler.h b/kernel-src/include/kernel/scheduler.h
index d5c12a0e..8e0c29af 100644
--- a/kernel-src/include/kernel/scheduler.h
+++ b/kernel-src/include/kernel/scheduler.h
@@ -16,6 +16,9 @@
 #define SCHED_PROC_STATE_NORMAL 0
 #define SCHED_PROC_STATE_ZOMBIE 1
 
+#define SCHED_WAKEUP_REASON_NORMAL 0
+#define SCHED_WAKEUP_REASON_INTERRUPTED -1
+
 #define STACK_TOP (void *)0x0000800000000000
 #define INTERP_BASE (void *)0x00000beef0000000
 
diff --git a/kernel-src/io/keyboard.c b/kernel-src/io/keyboard.c
index 730d0c9e..f2cb6e39 100644
--- a/kernel-src/io/keyboard.c
+++ b/kernel-src/io/keyboard.c
@@ -113,7 +113,7 @@ void keyboard_sendpacket(keyboard_t *kb, kbpacket_t *packet) {
 
 int keyboard_wait(keyboard_t *kb, kbpacket_t *packet) {
 	int e = semaphore_wait(&kb->semaphore, true);
-	if (e == EINTR)
+	if (e == SCHED_WAKEUP_REASON_INTERRUPTED)
 		return e;
 	long ipl = interrupt_raiseipl(IPL_KEYBOARD);
 
diff --git a/kernel-src/sys/scheduler.c b/kernel-src/sys/scheduler.c
index 30dfd9df..cbeaffbb 100644
--- a/kernel-src/sys/scheduler.c
+++ b/kernel-src/sys/scheduler.c
@@ -296,7 +296,7 @@ void sched_wakeup(thread_t *thread, int reason) {
 	bool intstate = interrupt_set(false);
 	spinlock_acquire(&thread->sleeplock);
 
-	if ((thread->flags & SCHED_THREAD_FLAGS_SLEEP) == 0 || (reason == EINTR && (thread->flags & SCHED_THREAD_FLAGS_INTERRUPTIBLE) == 0)) {
+	if ((thread->flags & SCHED_THREAD_FLAGS_SLEEP) == 0 || ((reason == SCHED_WAKEUP_REASON_INTERRUPTED) && (thread->flags & SCHED_THREAD_FLAGS_INTERRUPTIBLE) == 0)) {
 		spinlock_release(&thread->sleeplock);
 		interrupt_set(intstate);
 		return;