diff --git a/src/openrct2/ParkFile.cpp b/src/openrct2/ParkFile.cpp
index d915081bbd..36cc6dcdac 100644
--- a/src/openrct2/ParkFile.cpp
+++ b/src/openrct2/ParkFile.cpp
@@ -1700,7 +1700,7 @@ namespace OpenRCT2
         cs.ReadWrite(guest.PreviousRideTimeOut);
         cs.ReadWriteArray(guest.Thoughts, [&cs](rct_peep_thought& thought) {
             cs.ReadWrite(thought.type);
-            cs.ReadWrite(thought.item);
+            cs.ReadWrite(thought.argument);
             cs.ReadWrite(thought.freshness);
             cs.ReadWrite(thought.fresh_timeout);
             return true;
diff --git a/src/openrct2/core/DataSerialiserTraits.h b/src/openrct2/core/DataSerialiserTraits.h
index 48c5948ea6..14d0ee1736 100644
--- a/src/openrct2/core/DataSerialiserTraits.h
+++ b/src/openrct2/core/DataSerialiserTraits.h
@@ -850,14 +850,14 @@ template<> struct DataSerializerTraits_t<rct_peep_thought>
     static void encode(OpenRCT2::IStream* stream, const rct_peep_thought& val)
     {
         stream->Write(&val.type);
-        stream->Write(&val.item);
+        stream->Write(&val.argument);
         stream->Write(&val.freshness);
         stream->Write(&val.fresh_timeout);
     }
     static void decode(OpenRCT2::IStream* stream, rct_peep_thought& val)
     {
         stream->Read(&val.type);
-        stream->Read(&val.item);
+        stream->Read(&val.argument);
         stream->Read(&val.freshness);
         stream->Read(&val.fresh_timeout);
     }