diff --git a/src/shared/ptyfwd.c b/src/shared/ptyfwd.c
index c1e3b7180b..72f91b0b62 100644
--- a/src/shared/ptyfwd.c
+++ b/src/shared/ptyfwd.c
@@ -42,6 +42,11 @@ typedef enum AnsiColorState  {
         _ANSI_COLOR_STATE_INVALID = -EINVAL,
 } AnsiColorState;
 
+#define ANSI_SEQUENCE_LENGTH_MAX 192U
+#define ANSI_SEQUENCE_WINDOW_TITLE_MAX 128U
+
+assert_cc(ANSI_SEQUENCE_LENGTH_MAX > ANSI_SEQUENCE_WINDOW_TITLE_MAX);
+
 struct PTYForward {
         sd_event *event;
 
@@ -463,7 +468,7 @@ static int pty_forward_ansi_process(PTYForward *f, size_t offset) {
                                 /* If this is a "parameter" or "intermediary" byte (i.e. ranges 0x20…0x2F and
                                  * 0x30…0x3F) then we are still in the CSI sequence */
 
-                                if (strlen_ptr(f->csi_sequence) >= 64) {
+                                if (strlen_ptr(f->csi_sequence) >= ANSI_SEQUENCE_LENGTH_MAX) {
                                         /* Safety check: lets not accept unbounded CSI sequences */
 
                                         f->csi_sequence = mfree(f->csi_sequence);
@@ -498,7 +503,7 @@ static int pty_forward_ansi_process(PTYForward *f, size_t offset) {
                 case ANSI_COLOR_STATE_OSC_SEQUENCE:
 
                         if ((uint8_t) c >= ' ') {
-                                if (strlen_ptr(f->osc_sequence) >= 64) {
+                                if (strlen_ptr(f->osc_sequence) >= ANSI_SEQUENCE_LENGTH_MAX) {
                                         /* Safety check: lets not accept unbounded OSC sequences */
                                         f->osc_sequence = mfree(f->osc_sequence);
                                         break;
@@ -1115,7 +1120,18 @@ int pty_forward_set_title(PTYForward *f, const char *title) {
         if (f->out_buffer_size > 0)
                 return -EBUSY;
 
-        return free_and_strdup(&f->title, title);
+        if (!title) {
+                f->title = mfree(f->title);
+                return 0;
+        }
+
+        /* Truncate the title to 128 chars, since some terminal emulators really don't like overly long ANSI
+         * sequences */
+        _cleanup_free_ char *ellipsized = ellipsize(title, ANSI_SEQUENCE_WINDOW_TITLE_MAX, 66);
+        if (!ellipsized)
+                return -ENOMEM;
+
+        return free_and_replace(f->title, ellipsized);
 }
 
 int pty_forward_set_titlef(PTYForward *f, const char *format, ...) {
@@ -1135,7 +1151,7 @@ int pty_forward_set_titlef(PTYForward *f, const char *format, ...) {
         if (r < 0)
                 return -ENOMEM;
 
-        return free_and_replace(f->title, title);
+        return pty_forward_set_title(f, title);
 }
 
 int pty_forward_set_title_prefix(PTYForward *f, const char *title_prefix) {