diff --git a/pom.xml b/pom.xml
index d44dc0a..d1b3a78 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.helenus</groupId>
     <artifactId>helenus-core</artifactId>
-    <version>2.0.33-SNAPSHOT</version>
+    <version>2.0.34-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>helenus</name>
diff --git a/src/main/java/net/helenus/core/HelenusSession.java b/src/main/java/net/helenus/core/HelenusSession.java
index af5c534..ff63e98 100644
--- a/src/main/java/net/helenus/core/HelenusSession.java
+++ b/src/main/java/net/helenus/core/HelenusSession.java
@@ -174,7 +174,7 @@ public final class HelenusSession extends AbstractSessionOperations implements C
 
   public synchronized <T extends Exception> UnitOfWork<T> begin() { return new UnitOfWork<T>(this, null).begin(); }
 
-  public synchronized UnitOfWork begin(UnitOfWork parent) {
+  public synchronized <T extends Exception> UnitOfWork<T> begin(UnitOfWork<T> parent) {
     UnitOfWork child = new UnitOfWork(this, parent);
     parent.addNestedUnitOfWork(child);
     return child.begin();