diff --git a/include/kvm/interrupt.h b/include/kvm/interrupt.h
index b895449..95d294f 100644
--- a/include/kvm/interrupt.h
+++ b/include/kvm/interrupt.h
@@ -1,5 +1,7 @@
+#ifndef KVM__INTERRUPT_H
+#define KVM__INTERRUPT_H
+
 #include <inttypes.h>
-#include <stdbool.h>
 
 #define IVT_BASE	0x0000
 #define IVT_VECTORS	256
@@ -14,3 +16,5 @@ void ivt_copy_table(void *dst, unsigned int size);
 struct ivt_entry * const ivt_get_entry(unsigned int n);
 void ivt_set_entry(struct ivt_entry e, unsigned int n);
 void ivt_set_all(struct ivt_entry e);
+
+#endif /* KVM__INTERRUPT_H */