diff --git a/projects/Closure/9/com/google/javascript/jscomp/ProcessCommonJSModules.java b/projects/Closure/9/com/google/javascript/jscomp/ProcessCommonJSModules.java
index 2987bda..6777957 100644
--- a/projects/Closure/9/com/google/javascript/jscomp/ProcessCommonJSModules.java
+++ b/projects/Closure/9/com/google/javascript/jscomp/ProcessCommonJSModules.java
@@ -116,6 +116,7 @@ public static String toModuleName(String requiredFilename,
   private String normalizeSourceName(String filename) {
     // The DOS command shell will normalize "/" to "\", so we have to
     // wrestle it back.
+    filename = filename.replace("\\", "/");
 
     if (filename.indexOf(filenamePrefix) == 0) {
       filename = filename.substring(filenamePrefix.length());
@@ -180,7 +181,7 @@ private void visitScript(NodeTraversal t, Node script) {
       Preconditions.checkArgument(scriptNodeCount == 1,
           "ProcessCommonJSModules supports only one invocation per " +
           "CompilerInput / script node");
-      String moduleName = guessCJSModuleName(normalizeSourceName(script.getSourceFileName()));
+      String moduleName = guessCJSModuleName(script.getSourceFileName());
       script.addChildToFront(IR.var(IR.name(moduleName), IR.objectlit())
           .copyInformationFromForTree(script));
       if (reportDependencies) {