diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/CallAVM2Item.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/CallAVM2Item.java
index 6b9bed180..2ce71091c 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/CallAVM2Item.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/CallAVM2Item.java
@@ -174,7 +174,12 @@ public class CallAVM2Item extends AVM2Item {
                         if (i >= arguments.size()) {
                             break;
                         }
-                        TypeItem type = new TypeItem(abc.constants.getMultiname(mi.param_types[i]).getNameWithNamespace(abc.constants, true /*??*/));
+                        GraphTargetItem type;
+                        if (mi.param_types[i] == 0) {
+                            type = TypeItem.UNBOUNDED;
+                        } else {                     
+                            type = new TypeItem(abc.constants.getMultiname(mi.param_types[i]).getNameWithNamespace(abc.constants, true /*??*/));
+                        }
                         arguments.set(i, AVM2SourceGenerator.handleAndOrCoerce(arguments.get(i), type));
                     }
                 }