diff --git a/dev/core/src/com/google/gwt/dev/CompilePerms.java b/dev/core/src/com/google/gwt/dev/CompilePerms.java
index 810a9b9..b2e7072 100644
--- a/dev/core/src/com/google/gwt/dev/CompilePerms.java
+++ b/dev/core/src/com/google/gwt/dev/CompilePerms.java
@@ -292,7 +292,7 @@
         }
       }
 
-      File[] resultFiles = makeResultFiles(compilerWorkDir, perms);
+      File[] resultFiles = makeResultFiles(compilerWorkDir, subPerms);
       compile(logger, precompilation, subPerms, options.getLocalWorkers(),
           resultFiles);
     }
diff --git a/dev/core/src/com/google/gwt/dev/Link.java b/dev/core/src/com/google/gwt/dev/Link.java
index b16262f..a255423 100644
--- a/dev/core/src/com/google/gwt/dev/Link.java
+++ b/dev/core/src/com/google/gwt/dev/Link.java
@@ -258,7 +258,8 @@
       Permutation[] perms = precompilation.getPermutations();
       File[] resultFiles = new File[perms.length];
       for (int i = 0; i < perms.length; ++i) {
-        resultFiles[i] = CompilePerms.makePermFilename(compilerWorkDir, i);
+        resultFiles[i] = CompilePerms.makePermFilename(compilerWorkDir,
+            perms[i].getId());
         if (!resultFiles[i].exists()) {
           logger.log(TreeLogger.ERROR, "File not found '"
               + precompilationFile.getAbsolutePath()