diff --git a/utils/system_daemon/main.cpp b/utils/system_daemon/main.cpp
index 9b817cfe..ac20a145 100755
--- a/utils/system_daemon/main.cpp
+++ b/utils/system_daemon/main.cpp
@@ -331,7 +331,7 @@ int main(int argc, char * argv[]) {
 	}
 	if (cli.hasArgument("daemon")) {
 		PIStringList args;
-		args << "-1" << "s";
+		args << "-1" << "-s";
 		if (cli.hasArgument("force"))
 			args << "-f";
 		if (cli.hasArgument("address"))