diff --git a/kern/libkern/stdbool.h b/kern/libkern/stdbool.h
index 9d50331..84e4d6d 100644
--- a/kern/libkern/stdbool.h
+++ b/kern/libkern/stdbool.h
@@ -1,8 +1,10 @@
 #ifndef _STDBOOL_H
 #define _STDBOOL_H
 
-/*TODO*/
-typedef char bool;
-enum { false = 0, true = 1 };
+/* Otherwise, bool, true and false are keywords. */
+#if !(defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L)
+typedef _Bool bool;
+enum : bool { false = 0, true = 1 };
+#endif
 
 #endif // _STDBOOL_H