diff --git a/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/wizards/STDWizardHandler.java b/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/wizards/STDWizardHandler.java
index 3d9062b95cc..6ae907f4e69 100644
--- a/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/wizards/STDWizardHandler.java
+++ b/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/wizards/STDWizardHandler.java
@@ -55,7 +55,7 @@ public class STDWizardHandler extends MBSWizardHandler {
 		ManagedProject mProj = new ManagedProject(des);
 		info.setManagedProject(mProj);
 
-		cfgs = fConfigPage.getCfgItems(defaults);
+		cfgs = CfgHolder.unique(fConfigPage.getCfgItems(defaults));
 
 		for (int i=0; i<cfgs.length; i++) {
 			String s = (cfgs[i].getToolChain() == null) ? "0" : ((ToolChain)(cfgs[i].getToolChain())).getId();  //$NON-NLS-1$