diff --git a/icu4j/src/com/ibm/icu/util/UResourceBundle.java b/icu4j/src/com/ibm/icu/util/UResourceBundle.java
index dfbeb225d7e..be9ace0b2f1 100644
--- a/icu4j/src/com/ibm/icu/util/UResourceBundle.java
+++ b/icu4j/src/com/ibm/icu/util/UResourceBundle.java
@@ -292,7 +292,7 @@ public abstract class UResourceBundle extends ResourceBundle{
      */
     protected static synchronized void addToCache(ClassLoader cl, String fullName, ULocale defaultLocale,  UResourceBundle b){
         cacheKey.setKeyValues(cl, fullName, defaultLocale);
-        addToCache(cacheKey.clone(), b);
+        addToCache((ResourceCacheKey)cacheKey.clone(), b);
     }
     /**
      * @internal revisit for ICU 3.6