diff --git a/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/SimpleType.java b/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/SimpleType.java
index cbe6057..8bd28fb 100644
--- a/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/SimpleType.java
+++ b/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/SimpleType.java
@@ -249,6 +249,7 @@
 	}
 
 	/**
+	 * @exception UnsupportedOperationException if this operation is used below JLS10
 	 * @since 3.14 BETA_JAVA_18_3
 	 */
 	@Override