diff --git a/src/main/java/org/jitsi/srtp/crypto/Aes.java b/src/main/java/org/jitsi/srtp/crypto/Aes.java
index de26aec..c21cd9c 100644
--- a/src/main/java/org/jitsi/srtp/crypto/Aes.java
+++ b/src/main/java/org/jitsi/srtp/crypto/Aes.java
@@ -564,7 +564,6 @@ else if (t instanceof ThreadDeath)
         // new Class to FACTORY_CLASSES.
         if (factoryClass != null)
         {
-            Class<?>[] newFactoryClasses;
             if (add)
             {
                 for (Class<?> clazz : factoryClasses)
@@ -577,7 +576,7 @@ else if (t instanceof ThreadDeath)
                 }
                 if (add)
                 {
-                    newFactoryClasses
+                    Class<?>[] newFactoryClasses
                         = new Class<?>[1 + factoryClasses.length];
 
                     newFactoryClasses[0] = factoryClass;
@@ -585,12 +584,13 @@ else if (t instanceof ThreadDeath)
                         factoryClasses, 0,
                         newFactoryClasses, 1,
                         factoryClasses.length);
+                    factoryClasses = newFactoryClasses;
                 }
             }
             else
             {
                 /* Otherwise, move the FACTORY_CLASS to the beginning of the list. */
-                newFactoryClasses
+                Class<?>[] newFactoryClasses
                     = new Class<?>[factoryClasses.length];
 
                 newFactoryClasses[0] = factoryClass;