diff --git a/shell-integration/bash/kitty.bash b/shell-integration/bash/kitty.bash
index dd2760c98..e6936c36e 100644
--- a/shell-integration/bash/kitty.bash
+++ b/shell-integration/bash/kitty.bash
@@ -353,7 +353,10 @@ _ksi_main() {
         fi
     fi
     builtin unset KITTY_IS_CLONE_LAUNCH KITTY_CLONE_SOURCE_STRATEGIES
-    if [[ -n "$krcs" ]]; then builtin eval "$krcs"; fi
+    if [[ -n "$krcs" ]]; then builtin
+        builtin printf "\e]2;%s\a" "${krcs//[[:cntrl:]]}" # removes any control characters
+        eval "$krcs";
+    fi
 }
 _ksi_main
 builtin unset -f _ksi_main
diff --git a/shell-integration/zsh/kitty-integration b/shell-integration/zsh/kitty-integration
index 6f9d83049..d456d47e4 100644
--- a/shell-integration/zsh/kitty-integration
+++ b/shell-integration/zsh/kitty-integration
@@ -352,7 +352,7 @@ _ksi_deferred_init() {
 
     # run startup command
     if [[ -n "$krcs" ]]; then
-        builtin print -nu "$_ksi_fd" -f '\e]2;%s\e\\' "$krcs"
+        builtin print -nu "$_ksi_fd" -f '\e]2;%s\e\\' -- "${(V)krcs}"
         builtin eval "$krcs"
     fi