diff --git a/lib/plugin.js b/lib/plugin.js
index 06c1a35..fc4493e 100644
--- a/lib/plugin.js
+++ b/lib/plugin.js
@@ -11,7 +11,7 @@ const axiosExtra = {
     for (const scope of Array.isArray(scopes) ? scopes : [ scopes ]) {
       if (!value) {
         delete this.defaults.headers[scope][name];
-        return
+        continue
       }
       this.defaults.headers[scope][name] = value
     }