diff --git a/shell-integration/bash/kitty.bash b/shell-integration/bash/kitty.bash
index bb0ea08c7..4f51de4a6 100644
--- a/shell-integration/bash/kitty.bash
+++ b/shell-integration/bash/kitty.bash
@@ -251,8 +251,11 @@ _ksi_main() {
     elif [[ $(builtin declare -p PROMPT_COMMAND 2> /dev/null) =~ 'declare -a PROMPT_COMMAND' ]]; then
         PROMPT_COMMAND+=("$pc")
     else
-        PROMPT_COMMAND="${PROMPT_COMMAND%%[[:space:]]}"
-        PROMPT_COMMAND="${PROMPT_COMMAND%%;}"
+        oldval=$(builtin shopt -p extglob)
+        builtin shopt -s extglob
+        PROMPT_COMMAND="${PROMPT_COMMAND%%+([[:space:]])}"
+        PROMPT_COMMAND="${PROMPT_COMMAND%%+(;)}"
+        builtin eval "$oldval"
         PROMPT_COMMAND+="; $pc"
     fi
 }