diff --git a/cmd/observer/node_builder/observer_builder.go b/cmd/observer/node_builder/observer_builder.go
index 2a5d0571780..9bf08313a48 100644
--- a/cmd/observer/node_builder/observer_builder.go
+++ b/cmd/observer/node_builder/observer_builder.go
@@ -857,7 +857,7 @@ func (builder *ObserverServiceBuilder) extraFlags() {
 		}
 
 		if builder.rpcConf.RestConfig.MaxRequestSize <= 0 {
-			return errors.New("rest-max-request-size must be greater than or equal to 0")
+			return errors.New("rest-max-request-size must be greater than 0")
 		}
 
 		return nil