diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index 3f91fbc2..05fd4aff 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -22,10 +22,8 @@
 
 *******************************************************************************/
 
-/* TODO: POSIX-1.2008 compliance is only partial */
-
-#ifndef	_UNISTD_H
-#define	_UNISTD_H 1
+#ifndef _MALLOC_H
+#define _MALLOC_H 1
 
 #include <features.h>