diff --git a/projects/Closure/64/com/google/javascript/jscomp/Compiler.java b/projects/Closure/64/com/google/javascript/jscomp/Compiler.java
index 71f76d8..45d88ba 100644
--- a/projects/Closure/64/com/google/javascript/jscomp/Compiler.java
+++ b/projects/Closure/64/com/google/javascript/jscomp/Compiler.java
@@ -1429,7 +1429,7 @@ public Void call() throws Exception {
 
         // if LanguageMode is ECMASCRIPT5_STRICT, only print 'use strict'
         // for the first input file
-        String code = toSource(root, sourceMap);
+        String code = toSource(root, sourceMap, inputSeqNum == 0);
         if (!code.isEmpty()) {
           cb.append(code);
 
@@ -1458,19 +1458,19 @@ public Void call() throws Exception {
   @Override
   String toSource(Node n) {
     initCompilerOptionsIfTesting();
-    return toSource(n, null);
+    return toSource(n, null, true);
   }
 
   /**
    * Generates JavaScript source code for an AST.
    */
-  private String toSource(Node n, SourceMap sourceMap) {
+  private String toSource(Node n, SourceMap sourceMap, boolean firstOutput) {
     CodePrinter.Builder builder = new CodePrinter.Builder(n);
     builder.setPrettyPrint(options.prettyPrint);
     builder.setLineBreak(options.lineBreak);
     builder.setSourceMap(sourceMap);
     builder.setSourceMapDetailLevel(options.sourceMapDetailLevel);
-    builder.setTagAsStrict(
+    builder.setTagAsStrict(firstOutput &&
         options.getLanguageOut() == LanguageMode.ECMASCRIPT5_STRICT);
     builder.setLineLengthThreshold(options.lineLengthThreshold);