diff --git a/src/java/org/apache/lucene/search/ExtendedFieldCache.java b/src/java/org/apache/lucene/search/ExtendedFieldCache.java
index 813e26c1879..50a118f1bbd 100644
--- a/src/java/org/apache/lucene/search/ExtendedFieldCache.java
+++ b/src/java/org/apache/lucene/search/ExtendedFieldCache.java
@@ -41,7 +41,7 @@ public interface ExtendedFieldCache extends FieldCache {
     public double parseDouble(String string);
   }
 
-  public static ExtendedFieldCache EXT_DEFAULT = new ExtendedFieldCacheImpl();
+  public static ExtendedFieldCache EXT_DEFAULT = (ExtendedFieldCache)FieldCache.DEFAULT;
 
   /**
    * Checks the internal cache for an appropriate entry, and if none is
diff --git a/src/java/org/apache/lucene/search/FieldCache.java b/src/java/org/apache/lucene/search/FieldCache.java
index a852c596e17..fcfbf45875c 100644
--- a/src/java/org/apache/lucene/search/FieldCache.java
+++ b/src/java/org/apache/lucene/search/FieldCache.java
@@ -127,7 +127,7 @@ public interface FieldCache {
   }
 
   /** Expert: The cache used internally by sorting and range query classes. */
-  public static FieldCache DEFAULT = new FieldCacheImpl();
+  public static FieldCache DEFAULT = new ExtendedFieldCacheImpl();
 
   /** Checks the internal cache for an appropriate entry, and if none is
    * found, reads the terms in <code>field</code> as a single byte and returns an array