diff --git a/spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/DefaultPersistenceUnitManager.java b/spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/DefaultPersistenceUnitManager.java
index 58217357011269453cb0f36544cf571bd89d8aca..bf9283eae2e829ea16c095e5e584ec902c90c5f3 100644
--- a/spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/DefaultPersistenceUnitManager.java
+++ b/spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/DefaultPersistenceUnitManager.java
@@ -615,8 +615,8 @@ public class DefaultPersistenceUnitManager
 			return null;
 		}
 		try {
-			Resource res = this.resourcePatternResolver.getResource(this.defaultPersistenceUnitRootLocation);
-			return res.getURL();
+			URL url = this.resourcePatternResolver.getResource(this.defaultPersistenceUnitRootLocation).getURL();
+			return (ResourceUtils.isJarURL(url) ? ResourceUtils.extractJarFileURL(url) : url);
 		}
 		catch (IOException ex) {
 			throw new PersistenceException("Unable to resolve persistence unit root URL", ex);