diff --git a/src/cli.c b/src/cli.c
index 9c7794945..6625a093d 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -825,7 +825,7 @@ static int cli_io_handler_show_fd(struct appctx *appctx)
 			li = fdt.owner;
 
 		chunk_printf(&trash,
-			     "  %5d : st=0x%02x(R:%c%c%c W:%c%c%c) ev=0x%02x(%c%c%c%c%c) [%c%c%c%c] cache=%u owner=%p iocb=%p(%s)",
+			     "  %5d : st=0x%02x(R:%c%c%c W:%c%c%c) ev=0x%02x(%c%c%c%c%c) [%c%c%c%c] cache=%u owner=%p iocb=%p(%s) tmask=0x%lx",
 			     fd,
 			     fdt.state,
 			     (fdt.state & FD_EV_POLLED_R) ? 'P' : 'p',
@@ -850,7 +850,8 @@ static int cli_io_handler_show_fd(struct appctx *appctx)
 			     (fdt.iocb == conn_fd_handler)  ? "conn_fd_handler" :
 			     (fdt.iocb == dgram_fd_handler) ? "dgram_fd_handler" :
 			     (fdt.iocb == listener_accept)  ? "listener_accept" :
-			     "unknown");
+			     "unknown",
+			     fdt.thread_mask);
 
 		if (fdt.iocb == conn_fd_handler) {
 			chunk_appendf(&trash, " cflg=0x%08x", conn_flags);