diff --git a/src/multitasking/scheduler.c b/src/multitasking/scheduler.c
index 674c5d9..39f6c44 100644
--- a/src/multitasking/scheduler.c
+++ b/src/multitasking/scheduler.c
@@ -3,14 +3,16 @@
 #include "task.h"
 #include "time.h"
 
-struct task *current_task;
+#include <stddef.h>
+
+struct task *current_task = NULL;
 
 void scheduler(void)
 {
-	if (!current_task)
+	if (!current_task || current_task->next == current_task)
 		return;
 	struct task *it = current_task->next;
-	while (it && it->next != it && it->status != RUN)
+	while (it && it->status != RUN)
 		it = it->next;
 	switch_to_task(it);
 }