diff --git a/hibernate-core/src/main/java/org/hibernate/boot/model/internal/GeneratorBinder.java b/hibernate-core/src/main/java/org/hibernate/boot/model/internal/GeneratorBinder.java
index 3a3e7cb18108..d191ec59b15e 100644
--- a/hibernate-core/src/main/java/org/hibernate/boot/model/internal/GeneratorBinder.java
+++ b/hibernate-core/src/main/java/org/hibernate/boot/model/internal/GeneratorBinder.java
@@ -835,7 +835,7 @@ else if ( !generatorAnnotations.isEmpty() ) {
 					Locale.ROOT,
 					"Identifier attribute '%s' is annotated '%s' which is not an '@IdGeneratorType'",
 					getPath( propertyHolder, inferredData ),
-					generatorAnnotations.get(0).annotationType()
+					generatorAnnotations.get(0).annotationType().getName()
 			) );
 		}
 		else if ( idAttributeMember.hasDirectAnnotationUsage( GeneratedValue.class ) ) {