diff --git a/cronosagent.sh b/cronosagent.sh
index 1895232..129a968 100755
--- a/cronosagent.sh
+++ b/cronosagent.sh
@@ -6,7 +6,7 @@ SERVER_ADDRESS=aesyle.dstar.su
 SERVER_PASSWORD=passw0rd
 SERVICE_MODE=1
 
-if [ -n "$!" ]
+if [ -n "$1" ]
 then
   # 1 - print to standard output
   # 2 - print to system log