diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/MySQL5Dialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/MySQL5Dialect.java
index c58320cf33..3f79ae8fb4 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/MySQL5Dialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/MySQL5Dialect.java
@@ -60,4 +60,9 @@ public class MySQL5Dialect extends MySQLDialect {
 	public String getQueryHintString(String query, String hints) {
 		return IndexQueryHintHandler.INSTANCE.addQueryHints( query, hints );
 	}
+
+	@Override
+	public boolean supportsUnionAll() {
+		return true;
+	}
 }