diff --git a/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/actions/ChangeBuildConfigActionBase.java b/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/actions/ChangeBuildConfigActionBase.java
index ca39fd1878a..74dfa89ca95 100644
--- a/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/actions/ChangeBuildConfigActionBase.java
+++ b/build/org.eclipse.cdt.managedbuilder.ui/src/org/eclipse/cdt/managedbuilder/ui/actions/ChangeBuildConfigActionBase.java
@@ -108,7 +108,7 @@ public class ChangeBuildConfigActionBase {
 				}
 			}
 			if (commonName) {
-				StringBuilder builder = new StringBuilder(sName);
+				StringBuffer builder = new StringBuffer(sName);
 				if (commonDesc) {
 					if (sDesc != null) {
 						builder.append(" (");	//$NON-NLS-1$