diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc2df5f52..b8fc4b633 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,6 +49,7 @@ All notable changes to this project will be documented in this file.
 - AS3 decompilation: increment/decrement on properties
 - AS1/2 Goto search result not properly selecting line (delay)
 - ActiveX exceptions when FlashPlayer disabled in classic GUI
+- #1569 AS3 direct editation - incorrect slot names handling (IndexOutOfBounds)
 
 ### Changed
 - #1565, #1407, #1350 On BinaryData SWF save, parent SWF is saved
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/AVM2SourceGenerator.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/AVM2SourceGenerator.java
index 218bde8c5..3133e73ad 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/AVM2SourceGenerator.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/AVM2SourceGenerator.java
@@ -1730,6 +1730,8 @@ public class AVM2SourceGenerator implements SourceGenerator {
                                     registerNames.add(UNUSED);
                                     registerTypes.add("*");
                                     registerLines.add(paramLine);
+                                    slotNames.add(UNUSED);
+                                    slotTypes.add("*");
                                 }
                                 registerNames.set(regIndex, varName);
                                 registerTypes.set(regIndex, varName);