diff --git a/org.eclipse.jdt.core.manipulation/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchyCore.java b/org.eclipse.jdt.core.manipulation/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchyCore.java
index 1c24a09ac11..e09860851b6 100644
--- a/org.eclipse.jdt.core.manipulation/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchyCore.java	
+++ b/org.eclipse.jdt.core.manipulation/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchyCore.java	
@@ -46,10 +46,10 @@
 
 public class CallHierarchyCore {
 
-    private static final String PREF_USE_IMPLEMENTORS= "PREF_USE_IMPLEMENTORS"; //$NON-NLS-1$
-    private static final String PREF_USE_FILTERS= "PREF_USE_FILTERS"; //$NON-NLS-1$
-    private static final String PREF_FILTERS_LIST= "PREF_FILTERS_LIST"; //$NON-NLS-1$
-    private static final String PREF_FILTER_TESTCODE= "PREF_FILTER_TESTCODE"; //$NON-NLS-1$
+    public static final String PREF_USE_IMPLEMENTORS= "PREF_USE_IMPLEMENTORS"; //$NON-NLS-1$
+    public static final String PREF_USE_FILTERS= "PREF_USE_FILTERS"; //$NON-NLS-1$
+    public static final String PREF_FILTERS_LIST= "PREF_FILTERS_LIST"; //$NON-NLS-1$
+    public static final String PREF_FILTER_TESTCODE= "PREF_FILTER_TESTCODE"; //$NON-NLS-1$
 
     private String defaultIgnoreFilters= "java.*,javax.*"; //$NON-NLS-1$
 
diff --git a/org.eclipse.jdt.ui/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchy.java b/org.eclipse.jdt.ui/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchy.java
index 8a8cd726bd8..548ff8455ac 100644
--- a/org.eclipse.jdt.ui/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchy.java	
+++ b/org.eclipse.jdt.ui/core extension/org/eclipse/jdt/internal/corext/callhierarchy/CallHierarchy.java	
@@ -17,6 +17,11 @@
  *******************************************************************************/
 package org.eclipse.jdt.internal.corext.callhierarchy;
 
+import static org.eclipse.jdt.internal.corext.callhierarchy.CallHierarchyCore.PREF_FILTERS_LIST;
+import static org.eclipse.jdt.internal.corext.callhierarchy.CallHierarchyCore.PREF_FILTER_TESTCODE;
+import static org.eclipse.jdt.internal.corext.callhierarchy.CallHierarchyCore.PREF_USE_FILTERS;
+import static org.eclipse.jdt.internal.corext.callhierarchy.CallHierarchyCore.PREF_USE_IMPLEMENTORS;
+
 import java.util.Collection;
 import java.util.List;
 
@@ -37,10 +42,6 @@
 import org.eclipse.jdt.internal.ui.util.StringMatcher;
 
 public class CallHierarchy {
-    private static final String PREF_USE_IMPLEMENTORS= "PREF_USE_IMPLEMENTORS"; //$NON-NLS-1$
-    private static final String PREF_USE_FILTERS = "PREF_USE_FILTERS"; //$NON-NLS-1$
-    private static final String PREF_FILTERS_LIST = "PREF_FILTERS_LIST"; //$NON-NLS-1$
-    private static final String PREF_FILTER_TESTCODE= "PREF_FILTER_TESTCODE"; //$NON-NLS-1$
 
     private static CallHierarchy fgInstance;
     private CallHierarchyCore fgCallHierarchyCore;