diff --git a/lib/linter/linter.js b/lib/linter/linter.js
index 29d78da3969e2a3560d056af5683a08083562984..a6ae07b7142a353fcd8d58b55a7e68b8f81b2846 100644
--- a/lib/linter/linter.js
+++ b/lib/linter/linter.js
@@ -704,7 +704,7 @@ function createLanguageOptions({ globals: configuredGlobals, parser, parserOptio
  */
 function resolveGlobals(providedGlobals, enabledEnvironments) {
     return Object.assign(
-        {},
+        Object.create(null),
         ...enabledEnvironments.filter(env => env.globals).map(env => env.globals),
         providedGlobals
     );