diff --git a/screen.c b/screen.c
index 18f4d519..b257f695 100644
--- a/screen.c
+++ b/screen.c
@@ -751,6 +751,8 @@ screen_mode_to_string(int mode)
 		strlcat(tmp, "CURSOR_BLINKING,", sizeof tmp);
 	if (mode & MODE_CURSOR_VERY_VISIBLE)
 		strlcat(tmp, "CURSOR_VERY_VISIBLE,", sizeof tmp);
+	if (mode & MODE_CURSOR_BLINKING_SET)
+		strlcat(tmp, "CURSOR_BLINKING_SET,", sizeof tmp);
 	if (mode & MODE_MOUSE_UTF8)
 		strlcat(tmp, "MOUSE_UTF8,", sizeof tmp);
 	if (mode & MODE_MOUSE_SGR)
@@ -771,7 +773,10 @@ screen_mode_to_string(int mode)
 		strlcat(tmp, "KEYS_EXTENDED_2,", sizeof tmp);
 	if (mode & MODE_THEME_UPDATES)
 		strlcat(tmp, "THEME_UPDATES,", sizeof tmp);
-	tmp[strlen(tmp) - 1] = '\0';
+	if (mode & MODE_SYNC)
+		strlcat(tmp, "SYNC,", sizeof tmp);
+	if (*tmp != '\0')
+		tmp[strlen(tmp) - 1] = '\0';
 	return (tmp);
 }