diff --git a/cmd/mo-dump/main.go b/cmd/mo-dump/main.go
index 3052122..91dcece 100644
--- a/cmd/mo-dump/main.go
+++ b/cmd/mo-dump/main.go
@@ -119,6 +119,9 @@ func main() {
 			}
 		}
 	}
+	if opt.tables == nil {
+		opt.emptyTables = true
+	}
 
 	//replace : in username to #, because : is used as separator in dsn.
 	//password can have ":".
@@ -149,9 +152,6 @@ func main() {
 		if err != nil {
 			return
 		}
-		if opt.tables == nil {
-			opt.emptyTables = true
-		}
 	}
 
 	err = opt.dumpData(ctx)