diff --git a/src/p_actionfunctions.cpp b/src/p_actionfunctions.cpp
index 8b5916207..7a4e92eb2 100644
--- a/src/p_actionfunctions.cpp
+++ b/src/p_actionfunctions.cpp
@@ -223,7 +223,7 @@ DEFINE_ACTION_FUNCTION(ACustomInventory, CallStateChain)
 {
 	PARAM_SELF_PROLOGUE(AStateProvider);
 	PARAM_OBJECT(affectee, AActor);
-	PARAM_STATE(state);
+	PARAM_POINTER(state, FState);
 	ACTION_RETURN_BOOL(self->CallStateChain(affectee, state));
 }