diff --git a/src/com/google/javascript/jscomp/DefaultPassConfig.java b/src/com/google/javascript/jscomp/DefaultPassConfig.java
index <HASH>..<HASH> 100644
--- a/src/com/google/javascript/jscomp/DefaultPassConfig.java
+++ b/src/com/google/javascript/jscomp/DefaultPassConfig.java
@@ -2560,6 +2560,11 @@ public final class DefaultPassConfig extends PassConfig {
     protected CompilerPass create(AbstractCompiler compiler) {
       return new DeadAssignmentsElimination(compiler);
     }
+
+    @Override
+    protected FeatureSet featureSet() {
+      return ES8_MODULES;
+    }
   };
 
   /** Kills dead property assignments. */
Run DeadAssignmentElimination pass when language_out is ES6+.

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Created by MOE: <URL>