diff --git a/trunk/src/com/jpexs/decompiler/flash/SWF.java b/trunk/src/com/jpexs/decompiler/flash/SWF.java
index ffeff2c0e..8424f483d 100644
--- a/trunk/src/com/jpexs/decompiler/flash/SWF.java
+++ b/trunk/src/com/jpexs/decompiler/flash/SWF.java
@@ -1,16 +1,16 @@
 /*
  *  Copyright (C) 2010-2013 JPEXS
- * 
+ *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation, either version 3 of the License, or
  *  (at your option) any later version.
- * 
+ *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
- * 
+ *
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
@@ -1742,7 +1742,10 @@ public class SWF {
             if (tag instanceof SymbolClassTag) {
                 SymbolClassTag sc = (SymbolClassTag) tag;
                 for (int i = 0; i < sc.classNames.length; i++) {
-                    sc.classNames[i] = deobfuscateNameWithPackage(sc.classNames[i], renameType, deobfuscated);
+                    String newname = deobfuscateNameWithPackage(sc.classNames[i], renameType, deobfuscated);
+                    if(newname!=null){
+                        sc.classNames[i] = newname;
+                    }
                 }
             }
         }