diff --git a/wled b/wled
index 946d282..a35e524 100755
--- a/wled
+++ b/wled
@@ -10,7 +10,7 @@ CURL_FLAGS="--silent --show-error --fail --ipv4 --max-filesize 64K"
 
 print_usage() {
     echo "Usage: $0 f(nordcenter)|w(ohnzimmer) on|off|1-17|list"
-    echo "       $0 f(nordcenter)|w(ohnzimmer) b(rightness) [1-255]"
+    echo "       $0 f(nordcenter)|w(ohnzimmer) b(rightness) 1-255"
 }
 
 # Parse host argument.
@@ -90,8 +90,8 @@ if test $curl_exit -ne 0; then
     exit 1
 fi
 
-# Check API responce. Should be {"success":true}.
-if test "$(echo -n "$api_resp"|tr -c -d '[:alpha:]')" != 'successtrue'; then
+# Check API responce.
+if test "$api_resp" != '{"success":true}'; then
     echo "Error: unexpected responce from WLED API." >&2
     exit 1
 fi