diff --git a/kitty/terminfo.py b/kitty/terminfo.py
index 8fc5eb4ec..d9310f497 100644
--- a/kitty/terminfo.py
+++ b/kitty/terminfo.py
@@ -234,6 +234,7 @@ def encode_keystring(keybytes: bytes) -> str:
     'Smulx': r'\E[4:%p1%dm',  # this is a non-standard extension that some terminals use, so match them
     # Enter strikethrough mode
     'smxx': r'\E[9m',
+    'Sync': '\\EP=%p1%ds\\E\\',  # this is a non-standard extension supported by tmux for synchronized updates
     # Clear all tab stops
     'tbc': r'\E[3g',
     # To status line (used to set window titles)
@@ -437,7 +438,7 @@ def encode_keystring(keybytes: bytes) -> str:
 queryable_capabilities.update(string_capabilities)
 extra = (bool_capabilities | numeric_capabilities.keys() | string_capabilities.keys()) - set(termcap_aliases.values())
 no_termcap_for = frozenset(
-    'Su Smulx Tc setrgbf setrgbb fullkbd kUP kDN'.split() + [
+    'Su Smulx Sync Tc setrgbf setrgbb fullkbd kUP kDN'.split() + [
         'k{}{}'.format(key, mod)
         for key in 'UP DN RIT LFT END HOM IC DC PRV NXT'.split()
         for mod in range(3, 8)])
diff --git a/terminfo/kitty.terminfo b/terminfo/kitty.terminfo
index f74dc4e89..2179ff469 100644
--- a/terminfo/kitty.terminfo
+++ b/terminfo/kitty.terminfo
@@ -17,6 +17,7 @@ xterm-kitty|KovIdTTY,
 	lines#24,
 	pairs#32767,
 	Smulx=\E[4:%p1%dm,
+	Sync=\EP=%p1%ds\E\,
 	acsc=++\,\,--..00``aaffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
 	bel=^G,
 	bold=\E[1m,
diff --git a/terminfo/x/xterm-kitty b/terminfo/x/xterm-kitty
index 7b1a2abb5..4471e81c3 100644
Binary files a/terminfo/x/xterm-kitty and b/terminfo/x/xterm-kitty differ