diff --git a/include/types/fd.h b/include/types/fd.h
index 0abd3ef..c757345 100644
--- a/include/types/fd.h
+++ b/include/types/fd.h
@@ -32,7 +32,6 @@
 #include <types/protocols.h>
 
 /* different possible states for the fd */
-#define FD_STCLOSE	0
 #define FD_STLISTEN	1
 #define FD_STCONN	2
 #define FD_STREADY	3
@@ -70,7 +69,7 @@
 	struct {
 		int (*f)(int fd);            /* read/write function */
 	} cb[DIR_SIZE];
-	void *owner;                         /* the session (or proxy) associated with this fd */
+	void *owner;                         /* the session (or proxy) associated with this fd, NULL if closed */
 	struct {                             /* used by pollers which support speculative polling */
 		unsigned char e;             /* read and write events status. 4 bits, may be merged into flags' lower bits */
 		unsigned int s1;             /* Position in spec list+1. 0=not in list. */