diff --git a/tools/arkmanager b/tools/arkmanager
index 6400b25..35cb6b4 100755
--- a/tools/arkmanager
+++ b/tools/arkmanager
@@ -265,7 +265,7 @@ timestamp() {
 #
 logprint(){
   printf "%s\n" "$*"
-  printf "%s: %s\n" "$(timestamp)" "$*" >>"${logdir}/${arkmanagerLog}"
+  printf "%s: [%s] %s\n" "$(timestamp)" "${instance}" "$*" >>"${logdir}/${arkmanagerLog}"
 }
 
 #