diff --git a/src/com/jpexs/decompiler/flash/SWF.java b/src/com/jpexs/decompiler/flash/SWF.java
index 461ed19a7..9682c1d2b 100644
--- a/src/com/jpexs/decompiler/flash/SWF.java
+++ b/src/com/jpexs/decompiler/flash/SWF.java
@@ -608,7 +608,8 @@ public final class SWF implements TreeItem, Timelined {
 
         ArrayList<ABCContainerTag> newAbcList = new ArrayList<>();
         getABCTags(objs, newAbcList);
-        this.abcList = newAbcList;
+        isAS3 = !newAbcList.isEmpty();
+        abcList = newAbcList;
     }
 
     private static void getABCTags(List<ContainerItem> list, List<ABCContainerTag> actionScripts) {
diff --git a/src/com/jpexs/decompiler/flash/gui/MainPanel.java b/src/com/jpexs/decompiler/flash/gui/MainPanel.java
index bd7e2e443..10b485dd4 100644
--- a/src/com/jpexs/decompiler/flash/gui/MainPanel.java
+++ b/src/com/jpexs/decompiler/flash/gui/MainPanel.java
@@ -592,13 +592,10 @@ public final class MainPanel extends JPanel implements ActionListener, TreeSelec
 
         for (SWF swf : newSwfs) {
 
-            boolean hasAbc = !swf.abcList.isEmpty();
-            swf.isAS3 = hasAbc;
-
             tagTree.setModel(new TagTreeModel(mainFrame, swfs));
             dumpTree.setModel(new DumpTreeModel(swfs));
 
-            if (hasAbc) {
+            if (swf.isAS3) {
                 if (abcPanel == null) {
                     abcPanel = new ABCPanel(this);
                     displayPanel.add(abcPanel, CARDACTIONSCRIPT3PANEL);