diff --git a/src/parser/index.js b/src/parser/index.js
index a9882ff30a..1a0227fd4e 100644
--- a/src/parser/index.js
+++ b/src/parser/index.js
@@ -36,7 +36,7 @@ export default class Parser extends Tokenizer {
 
     if (plugins.indexOf("flow") >= 0) {
       // ensure flow plugin loads last
-      plugins.splice(plugins.indexOf("flow"), 1);
+      plugins = plugins.filter(plugin => plugin !== "flow");
       plugins.push("flow");
     }