diff --git a/lib/init/with.js b/lib/init/with.js
index 5162b32c..04a0221b 100644
--- a/lib/init/with.js
+++ b/lib/init/with.js
@@ -115,7 +115,9 @@ const shimmedDefineSetter = {
 				return getIsGettingScope() || key.startsWith(internalVarsPrefix);
 			},
 			get(target, key) {
-				return key === 'eval' ? getEval() : runEval(nativeEval, key);
+				if (key === Symbol.unscopables) return undefined;
+				if (key === 'eval') return getEval();
+				return runEval(nativeEval, key);
 			},
 			set(target, key, value) {
 				// Only used for setting internal temp vars, so no need to handle if key is `v` or `eval`