diff --git a/classpath/java/util/PropertyResourceBundle.java b/classpath/java/util/PropertyResourceBundle.java
index b299a08026..01dc850537 100644
--- a/classpath/java/util/PropertyResourceBundle.java
+++ b/classpath/java/util/PropertyResourceBundle.java
@@ -23,4 +23,8 @@ public class PropertyResourceBundle extends ResourceBundle {
   public Object handleGetObject(String key) {
     return map.get(key);
   }
+
+  public Enumeration<String> getKeys() {
+    return map.keys();
+  }
 }
diff --git a/classpath/java/util/ResourceBundle.java b/classpath/java/util/ResourceBundle.java
index cc80a2a957..97bde9b80c 100644
--- a/classpath/java/util/ResourceBundle.java
+++ b/classpath/java/util/ResourceBundle.java
@@ -118,4 +118,6 @@ public abstract class ResourceBundle {
   }
 
   protected abstract Object handleGetObject(String key);
+
+  public abstract Enumeration<String> getKeys();
 }