diff --git a/tools/c/sip-tools/sipserv.c b/tools/c/sip-tools/sipserv.c
index 0eab6b8..aa09033 100644
--- a/tools/c/sip-tools/sipserv.c
+++ b/tools/c/sip-tools/sipserv.c
@@ -231,7 +231,9 @@ int main(int argc, char *argv[])
 	register_sip();
 	
 	// app loop
-	for (;;) { }
+	for (;;) {
+		sleep(1);
+	}
 	
 	// exit app
 	app_exit();
@@ -820,4 +822,4 @@ static void error_exit(const char *title, pj_status_t status)
 		
 		exit(1);
 	}
-}
\ No newline at end of file
+}