diff --git a/source/exhumed/src/exhumed.cpp b/source/exhumed/src/exhumed.cpp
index 56a2fe0d7..8a80003ce 100644
--- a/source/exhumed/src/exhumed.cpp
+++ b/source/exhumed/src/exhumed.cpp
@@ -680,6 +680,7 @@ void SerializeState(FSerializer& arc)
             ("slipmode", bSlipMode)
             ("leveltime", leveltime)
             ("cinemaseen", nCinemaSeen)
+            ("spiritsprite", nSpiritSprite)
             .EndObject();
     }
 }