diff --git a/test.sh b/test.sh
index eff468e..23e4922 100755
--- a/test.sh
+++ b/test.sh
@@ -32,5 +32,5 @@ function myfunc()
 	echo "ok"
 }
 
-if [ $(detect_os[1]) = "debian" ]; then echo 'YES'; fi
+if [ ${$(detect_os OS)[1]} = "debian" ]; then echo 'YES'; fi