diff -urNp a/misc/terminfo.src b/misc/terminfo.src
--- a/misc/terminfo.src	2024-08-02 14:46:54.077817933 +0200
+++ b/misc/terminfo.src	2024-08-02 14:48:53.762373032 +0200
@@ -7946,6 +7946,7 @@ foot+base|foot base fragment,
 	sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p5%t;2%;%?%p2%t;4%;
 	    %?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m,
 	sgr0=\E(B\E[m, smam=\E[?7h, smkx=\E[?1h\E=, E3=\E[3J,
+	Smulx=\E[4:%p1%dm,
 	use=att610+cvis, use=ansi+csr, use=ansi+cup,
 	use=ansi+enq, use=ansi+local, use=ansi+idc, use=ansi+idl,
 	use=ansi+rca2, use=ansi+rep, use=ansi+tabs,
@@ -7953,7 +7954,7 @@ foot+base|foot base fragment,
 	use=ecma+strikeout, use=xterm+acs, use=xterm+alt+title,
 	use=xterm+pcfkeys, use=xterm+sm+1006, use=xterm+tmux2,
 	use=xterm+sl-alt, use=bracketed+paste,
-	use=report+version, use=xterm+focus,
+	use=report+version, use=xterm+focus, use=kitty+setal,
 
 ######## WEB CLIENTS