diff --git a/lib/main.js b/lib/main.js
index b75dbe1..6d04fa8 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -185,6 +185,8 @@ export default {
         if (fileExt === '.hpp' || fileExt === '.hh' || fileExt === '.h') {
           // Don't warn about #pragma once when linting header files
           args.push('-Wno-pragma-once-outside-header');
+          // Don't warn about unused-const-variable when linting header files
+          args.push('-Wno-unused-const-variable');
         }
 
         if (this.clangSuppressWarnings) {