diff --git a/format.c b/format.c
index e10f08c9..400e4320 100644
--- a/format.c
+++ b/format.c
@@ -601,8 +601,6 @@ format_window_pane(struct format_tree *ft, struct window_pane *wp)
 	    !!(wp->base.mode & MODE_MOUSE_STANDARD));
 	format_add(ft, "mouse_button_flag", "%d",
 	    !!(wp->base.mode & MODE_MOUSE_BUTTON));
-	format_add(ft, "mouse_any_flag", "%d",
-	    !!(wp->base.mode & MODE_MOUSE_ANY));
 	format_add(ft, "mouse_utf8_flag", "%d",
 	    !!(wp->base.mode & MODE_MOUSE_UTF8));
 
diff --git a/input.c b/input.c
index 4c1e0730..ac1db677 100644
--- a/input.c
+++ b/input.c
@@ -1374,7 +1374,6 @@ input_csi_dispatch_rm_private(struct input_ctx *ictx)
 		case 1000:
 		case 1001:
 		case 1002:
-		case 1003:
 			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
 			break;
 		case 1004:
@@ -1451,10 +1450,6 @@ input_csi_dispatch_sm_private(struct input_ctx *ictx)
 			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
 			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_BUTTON);
 			break;
-		case 1003:
-			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
-			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_ANY);
-			break;
 		case 1004:
 			if (ictx->ctx.s->mode & MODE_FOCUSON)
 				break;
diff --git a/server-client.c b/server-client.c
index 5616115c..4c58170f 100644
--- a/server-client.c
+++ b/server-client.c
@@ -647,7 +647,7 @@ server_client_reset_state(struct client *c)
 	 */
 	mode = s->mode;
 	if ((c->tty.mouse.flags & MOUSE_RESIZE_PANE) &&
-	    !(mode & (MODE_MOUSE_BUTTON|MODE_MOUSE_ANY)))
+	    !(mode & MODE_MOUSE_BUTTON))
 		mode |= MODE_MOUSE_BUTTON;
 
 	/*
diff --git a/tmux.h b/tmux.h
index bbf4e9dd..614b7077 100644
--- a/tmux.h
+++ b/tmux.h
@@ -682,13 +682,13 @@ struct mode_key_table {
 #define MODE_WRAP 0x10		/* whether lines wrap */
 #define MODE_MOUSE_STANDARD 0x20
 #define MODE_MOUSE_BUTTON 0x40
-#define MODE_MOUSE_ANY 0x80
+/* 0x80 unused */
 #define MODE_MOUSE_UTF8 0x100
 #define MODE_MOUSE_SGR 0x200
 #define MODE_BRACKETPASTE 0x400
 #define MODE_FOCUSON 0x800
 
-#define ALL_MOUSE_MODES (MODE_MOUSE_STANDARD|MODE_MOUSE_BUTTON|MODE_MOUSE_ANY)
+#define ALL_MOUSE_MODES (MODE_MOUSE_STANDARD|MODE_MOUSE_BUTTON)
 
 /* A single UTF-8 character. */
 struct utf8_data {
diff --git a/tty.c b/tty.c
index 3ae21ab5..9f57c365 100644
--- a/tty.c
+++ b/tty.c
@@ -513,16 +513,12 @@ tty_update_mode(struct tty *tty, int mode, struct screen *s)
 				tty_puts(tty, "\033[?1005l");
 			tty_puts(tty, "\033[?1006h");
 
-			if (mode & MODE_MOUSE_ANY)
-				tty_puts(tty, "\033[?1003h");
-			else if (mode & MODE_MOUSE_BUTTON)
+			if (mode & MODE_MOUSE_BUTTON)
 				tty_puts(tty, "\033[?1002h");
 			else if (mode & MODE_MOUSE_STANDARD)
 				tty_puts(tty, "\033[?1000h");
 		} else {
-			if (tty->mode & MODE_MOUSE_ANY)
-				tty_puts(tty, "\033[?1003l");
-			else if (tty->mode & MODE_MOUSE_BUTTON)
+			if (tty->mode & MODE_MOUSE_BUTTON)
 				tty_puts(tty, "\033[?1002l");
 			else if (tty->mode & MODE_MOUSE_STANDARD)
 				tty_puts(tty, "\033[?1000l");