diff --git a/hsarback/src/de/hsadmin/mods/pac/PacModuleImpl.java b/hsarback/src/de/hsadmin/mods/pac/PacModuleImpl.java
index 98fecc4..9e0b854 100644
--- a/hsarback/src/de/hsadmin/mods/pac/PacModuleImpl.java
+++ b/hsarback/src/de/hsadmin/mods/pac/PacModuleImpl.java
@@ -130,6 +130,16 @@ public class PacModuleImpl extends AbstractModuleImpl {
 		Pac newState = (Pac) entity;
 		EntityManager em = getTransaction().getEntityManager();
 		Pac oldState = em.find(Pac.class, newState.getId());
+
+		String oldCurINetAddr = oldState.getCurINetAddr().getInet4Addr();
+		String newCurINetAddr = newState.getCurINetAddr().getInet4Addr();
+		
+		System.out.println("new IP: " + newCurINetAddr);
+		System.out.println("old IP: " + oldCurINetAddr);
+		if (newCurINetAddr != null && !newCurINetAddr.isEmpty() && !newCurINetAddr.equals(oldCurINetAddr)) {
+			System.out.println("needs IP update");
+		}
+		
 		String oldBasepacName = oldState.getBasepac().getName();
 		BasePac newBasepac = newState.getBasepac();
 		String newBasepacName = newBasepac.getName();