diff --git a/dev/core/src/com/google/gwt/util/tools/Utility.java b/dev/core/src/com/google/gwt/util/tools/Utility.java
index 0f9957f..a41dbe8 100644
--- a/dev/core/src/com/google/gwt/util/tools/Utility.java
+++ b/dev/core/src/com/google/gwt/util/tools/Utility.java
@@ -239,7 +239,7 @@
   public static File makeTemporaryDirectory(File baseDir, String prefix)
       throws IOException {
     if (baseDir == null) {
-      baseDir = new File(System.getProperty("java.io.tmpdir"), GWT_TMP_DIR);
+      baseDir = new File(System.getProperty("java.io.tmpdir"));
     }
     baseDir.mkdirs();