diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/PropertyManager.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/PropertyManager.java
index 6e117bcad92..7e3dc9f488b 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/PropertyManager.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/PropertyManager.java
@@ -346,7 +346,7 @@ public class PropertyManager {
 	}
 	
 	protected Preferences getInstNode(IManagedProject mProject){
-		Preferences prefs = new InstanceScope().getNode(ManagedBuilderCorePlugin.getUniqueIdentifier());
+		Preferences prefs = InstanceScope.INSTANCE.getNode(ManagedBuilderCorePlugin.getUniqueIdentifier());
 		if(prefs != null){
 			prefs = prefs.node(NODE_NAME);
 			if(prefs != null)
diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/cdtvariables/UserDefinedVariableSupplier.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/cdtvariables/UserDefinedVariableSupplier.java
index c098d01fba3..96b4a0634be 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/cdtvariables/UserDefinedVariableSupplier.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/cdtvariables/UserDefinedVariableSupplier.java
@@ -482,7 +482,7 @@ public class UserDefinedVariableSupplier extends CoreMacroSupplierBase {
 	}
 	
 	private Preferences getWorkspaceNode(){
-		Preferences prefNode = new InstanceScope().getNode(CCorePlugin.PLUGIN_ID);
+		Preferences prefNode = InstanceScope.INSTANCE.getNode(CCorePlugin.PLUGIN_ID);
 		if(prefNode == null)
 			return null;
 		
diff --git a/xlc/org.eclipse.cdt.core.lrparser.xlc/parser/org/eclipse/cdt/core/lrparser/xlc/preferences/XlcLanguagePreferences.java b/xlc/org.eclipse.cdt.core.lrparser.xlc/parser/org/eclipse/cdt/core/lrparser/xlc/preferences/XlcLanguagePreferences.java
index 1e201483041..fb0719f22eb 100644
--- a/xlc/org.eclipse.cdt.core.lrparser.xlc/parser/org/eclipse/cdt/core/lrparser/xlc/preferences/XlcLanguagePreferences.java
+++ b/xlc/org.eclipse.cdt.core.lrparser.xlc/parser/org/eclipse/cdt/core/lrparser/xlc/preferences/XlcLanguagePreferences.java
@@ -91,11 +91,11 @@ public class XlcLanguagePreferences  {
 	
 	
 	private static Preferences getDefaultPreferences() {
-		return getPreferences(new DefaultScope());
+		return getPreferences(DefaultScope.INSTANCE);
 	}
 	
 	private static Preferences getWorkspacePreferences() {
-		return getPreferences(new InstanceScope());
+		return getPreferences(InstanceScope.INSTANCE);
 	}
 	
 	private static Preferences getProjectPreferences(IProject project) {