diff --git a/system.properties b/system.properties
index 9a872a39d..303bdca70 100644
--- a/system.properties
+++ b/system.properties
@@ -2,4 +2,5 @@
 jvm.resource.tracing=false
 check.thread.safety=false
 # for profiling
-jvm.safepoint.enabled=false
\ No newline at end of file
+jvm.safepoint.enabled=false
+x=
\ No newline at end of file