diff --git a/filebeat/input/syslog/event.go b/filebeat/input/syslog/event.go
index 1ffcf074a756..30c17bdef162 100644
--- a/filebeat/input/syslog/event.go
+++ b/filebeat/input/syslog/event.go
@@ -216,7 +216,7 @@ func (s *event) Priority() int {
 
 // HasPriority returns if the priority was in original event.
 func (s *event) HasPriority() bool {
-	return s.priority > 0
+	return s.priority >= 0
 }
 
 // Severity returns the severity, will return -1 if priority is not set.