diff --git a/server-client.c b/server-client.c
index d6a6159e..5d090dab 100644
--- a/server-client.c
+++ b/server-client.c
@@ -45,6 +45,7 @@ static void	server_client_check_redraw(struct client *);
 static void	server_client_check_modes(struct client *);
 static void	server_client_set_title(struct client *);
 static void	server_client_set_path(struct client *);
+static void	server_client_set_progress_bar(struct client *);
 static void	server_client_reset_state(struct client *);
 static void	server_client_update_latest(struct client *);
 static void	server_client_dispatch(struct imsg *, void *);
@@ -2060,6 +2061,7 @@ server_client_check_redraw(struct client *c)
 			server_client_set_title(c);
 			server_client_set_path(c);
 		}
+		server_client_set_progress_bar(c);
 		screen_redraw_screen(c);
 	}
 
@@ -2126,6 +2128,23 @@ server_client_set_path(struct client *c)
 	}
 }
 
+/* Set client progress bar. */
+static void
+server_client_set_progress_bar(struct client *c)
+{
+	struct session		*s = c->session;
+	struct progress_bar	*pane_pb;
+
+	if (s->curw == NULL)
+		return;
+	pane_pb = &s->curw->window->active->base.progress_bar;
+	if (pane_pb->state == c->progress_bar.state &&
+	    pane_pb->progress == c->progress_bar.progress)
+		return;
+	memcpy(&c->progress_bar, pane_pb, sizeof c->progress_bar);
+	tty_set_progress_bar(&c->tty, &c->progress_bar);
+}
+
 /* Dispatch message from client. */
 static void
 server_client_dispatch(struct imsg *imsg, void *arg)
diff --git a/tmux.1 b/tmux.1
index 4c3744bb..86ed67dc 100644
--- a/tmux.1
+++ b/tmux.1
@@ -4487,6 +4487,8 @@ mouse sequences.
 Supports the OSC 7 working directory extension.
 .It overline
 Supports the overline SGR attribute.
+.It progressbar
+Supports the OSC 9;4 progress bar extension.
 .It rectfill
 Supports the DECFRA rectangle fill escape sequence.
 .It RGB
@@ -7852,6 +7854,8 @@ $ printf \[aq]\e033[4 q\[aq]
 If
 .Em Se
 is not set, \&Ss with argument 0 will be used to reset the cursor style instead.
+.It Em \&Spb
+Set the state and progress for the OSC9;4 progress bar.
 .It Em \&Swd
 Set the opening sequence for the working directory notification.
 The sequence is terminated using the standard
diff --git a/tmux.h b/tmux.h
index 802278d8..63c1e30b 100644
--- a/tmux.h
+++ b/tmux.h
@@ -629,6 +629,7 @@ enum tty_code_code {
 	TTYC_SMUL,
 	TTYC_SMULX,
 	TTYC_SMXX,
+	TTYC_SPB,
 	TTYC_SXL,
 	TTYC_SS,
 	TTYC_SWD,
@@ -1982,6 +1983,7 @@ struct client {
 	char			*title;
 	char			*path;
 	const char		*cwd;
+	struct progress_bar	 progress_bar;
 
 	char			*term_name;
 	int			 term_features;
@@ -2621,6 +2623,7 @@ void	tty_repeat_requests(struct tty *, int);
 void	tty_stop_tty(struct tty *);
 void	tty_set_title(struct tty *, const char *);
 void	tty_set_path(struct tty *, const char *);
+void	tty_set_progress_bar(struct tty *, struct progress_bar *);
 void	tty_default_attributes(struct tty *, const struct grid_cell *,
 	    struct colour_palette *, u_int, struct hyperlinks *);
 void	tty_update_mode(struct tty *, int, struct screen *);
diff --git a/tty-features.c b/tty-features.c
index ce560b88..3560bbb0 100644
--- a/tty-features.c
+++ b/tty-features.c
@@ -347,6 +347,17 @@ static const struct tty_feature tty_feature_sixel = {
 	TERM_SIXEL
 };
 
+/* Terminal supports the OSC 9;4 progress bar. */
+static const char *const tty_feature_progressbar_capabilities[] = {
+	"Spb=\\E]9;4;%p1%d;%p2%d\\E\\\\",
+	NULL
+};
+static const struct tty_feature tty_feature_progressbar = {
+	"progressbar",
+	tty_feature_progressbar_capabilities,
+	0
+};
+
 /* Available terminal features. */
 static const struct tty_feature *const tty_features[] = {
 	&tty_feature_256,
@@ -362,6 +373,7 @@ static const struct tty_feature *const tty_features[] = {
 	&tty_feature_mouse,
 	&tty_feature_osc7,
 	&tty_feature_overline,
+	&tty_feature_progressbar,
 	&tty_feature_rectfill,
 	&tty_feature_rgb,
 	&tty_feature_sixel,
@@ -480,7 +492,8 @@ tty_default_features(int *feat, const char *name, u_int version)
 			      "focus,"
 			      "overline,"
 			      "usstyle,"
-			      "hyperlinks"
+			      "hyperlinks,"
+		  	      "progressbar"
 		},
 		{ .name = "rxvt-unicode",
 		  .features = "256,"
@@ -499,7 +512,8 @@ tty_default_features(int *feat, const char *name, u_int version)
 			      "usstyle,"
 			      "sync,"
 			      "osc7,"
-			      "hyperlinks"
+			      "hyperlinks,"
+		  	      "progressbar"
 		},
 		{ .name = "foot",
 		  .features = TTY_FEATURES_BASE_MODERN_XTERM ","
diff --git a/tty-term.c b/tty-term.c
index f664260a..aa9cd5ef 100644
--- a/tty-term.c
+++ b/tty-term.c
@@ -277,6 +277,7 @@ static const struct tty_term_code_entry tty_term_codes[] = {
 	[TTYC_SMULX] = { TTYCODE_STRING, "Smulx" },
 	[TTYC_SMUL] = { TTYCODE_STRING, "smul" },
 	[TTYC_SMXX] =  { TTYCODE_STRING, "smxx" },
+	[TTYC_SPB] = { TTYCODE_STRING, "Spb" },
 	[TTYC_SS] = { TTYCODE_STRING, "Ss" },
 	[TTYC_SWD] = { TTYCODE_STRING, "Swd" },
 	[TTYC_SYNC] = { TTYCODE_STRING, "Sync" },
diff --git a/tty.c b/tty.c
index 41cb71c1..34acbd83 100644
--- a/tty.c
+++ b/tty.c
@@ -2931,3 +2931,10 @@ tty_clipboard_query(struct tty *tty)
 		evtimer_add(&tty->clipboard_timer, &tv);
 	}
 }
+
+void
+tty_set_progress_bar(struct tty *tty, struct progress_bar *pb)
+{
+	if (tty_term_has(tty->term, TTYC_SPB))
+		tty_putcode_ii(tty, TTYC_SPB, pb->state, pb->progress);
+}