diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd08e2e4..1e02eec4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@
 ## Unreleased
 
 ### Added
+
+* `Sync` to terminfo. This is a tmux extension that indicates
+  _"Synchronized Updates"_ are supported.
+
 ### Changed
 ### Deprecated
 ### Removed
diff --git a/foot.info b/foot.info
index c330c20d..3cc4deec 100644
--- a/foot.info
+++ b/foot.info
@@ -32,6 +32,7 @@ foot+base|foot base fragment,
     Ms=\E]52;%p1%s;%p2%s\E\\,
     Se=\E[2 q,
     Ss=\E[%p1%d q,
+    Sync=\EP=%p1%ds\E\\,
     acsc=``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
     bel=^G,
     blink=\E[5m,