diff --git a/libc/include/netdb.h b/libc/include/netdb.h
index 9209590..e824a3a 100644
--- a/libc/include/netdb.h
+++ b/libc/include/netdb.h
@@ -153,9 +153,10 @@
 #define	EAI_SERVICE	 9	/* servname not supported for ai_socktype */
 #define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
 #define	EAI_SYSTEM	11	/* system error returned in errno */
-#define	EAI_BADHINTS	12
-#define	EAI_PROTOCOL	13
-#define	EAI_MAX		14
+#define	EAI_BADHINTS	12	/* invalid value for hints */
+#define	EAI_PROTOCOL	13	/* resolved protocol is unknown */
+#define	EAI_OVERFLOW	14	/* argument buffer overflow */
+#define	EAI_MAX		15
 
 /*
  * Flag values for getaddrinfo()