diff --git a/foot.info b/foot.info
index 4f95bf7b..9947c911 100644
--- a/foot.info
+++ b/foot.info
@@ -39,6 +39,7 @@
     PS=\E[200~,
     RV=\E[>c,
     Se=\E[ q,
+    Smulx=\E[4:%p1%dm,
     Ss=\E[%p1%d q,
     Sync=\E[?2026%?%p1%{1}%-%tl%eh,
     TS=\E]2;,