diff --git a/CHANGELOG.md b/CHANGELOG.md
index e19e77c0c..1adff4046 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ All notable changes to this project will be documented in this file.
 - AS3 p-code - IGNORE_REST method flag incorrectly shown as EXPLICIT
 - [#1989] AS3 - Slow deobfuscation (AVM2DeobfuscatorSimpleOld)
 - AS3 - getouterscope instruction support
+- [#1990] Cloning DefineSprite causing incorrect tags written
 
 ### Changed
 - AS1/2/3 P-code - format Number values with EcmaScript toString function
@@ -3006,6 +3007,7 @@ All notable changes to this project will be documented in this file.
 [#1982]: https://www.free-decompiler.com/flash/issues/1982
 [#1986]: https://www.free-decompiler.com/flash/issues/1986
 [#1989]: https://www.free-decompiler.com/flash/issues/1989
+[#1990]: https://www.free-decompiler.com/flash/issues/1990
 [#1970]: https://www.free-decompiler.com/flash/issues/1970
 [#1972]: https://www.free-decompiler.com/flash/issues/1972
 [#1973]: https://www.free-decompiler.com/flash/issues/1973
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWFInputStream.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWFInputStream.java
index 87a90cfb1..e544ddba5 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWFInputStream.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWFInputStream.java
@@ -1608,7 +1608,7 @@ public class SWFInputStream implements AutoCloseable {
             tagLength = available;
         }
 
-        ByteArrayRange dataRange = new ByteArrayRange(swf.uncompressedData, (int) pos, (int) (tagLength + headerLength));
+        ByteArrayRange dataRange = new ByteArrayRange(this.data, (int) pos, (int) (tagLength + headerLength));
         skipBytes(tagLength);
 
         TagStub tagStub = new TagStub(swf, tagID, "Unresolved", dataRange, tagDataStream);