diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
index 03bba0d39..40c769537 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
@@ -1336,10 +1336,14 @@ public final class SWF implements SWFContainerItem, Timelined, Openable {
         if (characterToId == null) {
             getCharacters(true);
         }
-        if (!characterToId.containsKey(tag)) {
+        Map<CharacterIdTag, Integer> characterToId2 = characterToId;
+        if (characterToId2 == null) {
             return -1;
         }
-        return characterToId.get(tag);
+        if (!characterToId2.containsKey(tag)) {
+            return -1;
+        }
+        return characterToId2.get(tag);
     }
 
     /**