--- a/lib/libkvm/kvm.h
+++ b/lib/libkvm/kvm.h
@@ -43,7 +43,8 @@
 #define	VRS_KEY		"VERSION"
 
 #ifndef _SIZE_T_DECLARED
-typedef	__size_t	size_t;
+#define __need_size_t
+#include <stddef.h>
 #define	_SIZE_T_DECLARED
 #endif