diff --git a/src/saveload/extended_ver_sl.cpp b/src/saveload/extended_ver_sl.cpp
index 7b083a7f21..7a3e0ced88 100644
--- a/src/saveload/extended_ver_sl.cpp
+++ b/src/saveload/extended_ver_sl.cpp
@@ -107,6 +107,7 @@ void SlXvResetState()
 {
 	_sl_is_ext_version = false;
 	_sl_is_faked_ext = false;
+	_sl_xv_discardable_chunk_ids.clear();
 	memset(_sl_xv_feature_versions, 0, sizeof(_sl_xv_feature_versions));
 }