diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
index 0a9db53..05879a6 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
@@ -51,7 +51,7 @@ open class LynonDecoder(val bin: BitInput, val settings: LynonSettings = LynonSe
         println("expected class name $className")
         return scope.get(className.value)?.value?.let {
             if (it !is ObjClass)
-                scope.raiseClassCastError("Expected obj class but got ${it::class.qualifiedName}")
+                scope.raiseClassCastError("Expected obj class but got ${it::class.simpleName}")
             it
         } ?: scope.raiseSymbolNotFound("can't deserialize: not found type $className")
     }