diff --git a/tools/perf/trace/beauty/arch_errno_names.sh b/tools/perf/trace/beauty/arch_errno_names.sh
index 2c5f72fa8108..37c53bac5f56 100755
--- a/tools/perf/trace/beauty/arch_errno_names.sh
+++ b/tools/perf/trace/beauty/arch_errno_names.sh
@@ -33,23 +33,13 @@ create_errno_lookup_func()
 	local arch=$(arch_string "$1")
 	local nr name
 
-	cat <<EoFuncBegin
-static const char *errno_to_name__$arch(int err)
-{
-	switch (err) {
-EoFuncBegin
+	printf "static const char *errno_to_name__%s(int err)\n{\n\tswitch (err) {\n" $arch
 
 	while read name nr; do
 		printf '\tcase %d: return "%s";\n' $nr $name
 	done
 
-	cat <<EoFuncEnd
-	default:
-		return "(unknown)";
-	}
-}
-
-EoFuncEnd
+	printf '\tdefault: return "(unknown)";\n\t}\n}\n'
 }
 
 process_arch()