diff --git a/src/structs.h b/src/structs.h
index a2b38bf..24d819b 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1419,6 +1419,8 @@
     int		ch_to_be_closed; /* When TRUE reading or writing failed and
 				  * the channel must be closed when it's safe
 				  * to invoke callbacks. */
+    int		ch_to_be_freed; /* When TRUE channel must be freed when it's
+				 * safe to invoke callbacks. */
     int		ch_error;	/* When TRUE an error was reported.  Avoids
 				 * giving pages full of error messages when
 				 * the other side has exited, only mention the