Changed combo box style.
diff --git a/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/mappings/details/CatalogCombo.java b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/mappings/details/CatalogCombo.java
index c2bb0b7..0544782 100644
--- a/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/mappings/details/CatalogCombo.java
+++ b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/mappings/details/CatalogCombo.java
@@ -136,7 +136,7 @@
 
 	@Override
 	protected void buildWidget(Composite parent) {
-		this.combo = getWidgetFactory().createCCombo(parent, SWT.READ_ONLY);
+		this.combo = getWidgetFactory().createCCombo(parent, SWT.FLAT | SWT.READ_ONLY);
 		this.combo.add(JptUiMappingsMessages.TableComposite_defaultEmpty);
 		this.combo.addModifyListener(new ModifyListener() {
 			public void modifyText(ModifyEvent e) {