diff --git a/jme3-networking/src/main/java/com/jme3/network/serializing/Serializer.java b/jme3-networking/src/main/java/com/jme3/network/serializing/Serializer.java
index 31d9c2c5ac..8e56e192e1 100644
--- a/jme3-networking/src/main/java/com/jme3/network/serializing/Serializer.java
+++ b/jme3-networking/src/main/java/com/jme3/network/serializing/Serializer.java
@@ -347,13 +347,13 @@ public static SerializerRegistration getSerializerRegistration(Class cls, boolea
         if (reg != null) return reg;
 
         for (Map.Entry<Class, SerializerRegistration> entry : classRegistrations.entrySet()) {
-            if (entry.getKey().isAssignableFrom(Serializable.class)) continue;
+            if (entry.getKey().isAssignableFrom(java.io.Serializable.class)) continue;
             if (entry.getKey().isAssignableFrom(cls)) return entry.getValue();
         }
 
         if (cls.isArray()) return registerClass(cls, arraySerializer);
 
-        if (Serializable.class.isAssignableFrom(cls)) { 
+        if (java.io.Serializable.class.isAssignableFrom(cls)) { 
             return getExactSerializerRegistration(java.io.Serializable.class);
         }