diff --git a/uppsrc/Core/Util.h b/uppsrc/Core/Util.h
index b1b737b2d..d819e678f 100644
--- a/uppsrc/Core/Util.h
+++ b/uppsrc/Core/Util.h
@@ -404,6 +404,8 @@ public:
 
 // ------------------- Advanced streaming --------------------
 
+void CheckedSerialize(const Callback1<Stream&> serialize, Stream& stream, int version = Null);
+
 bool Load(Callback1<Stream&> serialize, Stream& stream, int version = Null);
 bool Store(Callback1<Stream&> serialize, Stream& stream, int version = Null);
 bool LoadFromFile(Callback1<Stream&> serialize, const char *file = NULL, int version = Null);
diff --git a/uppsrc/Core/Value.hpp b/uppsrc/Core/Value.hpp
index 816a0d3a8..d7adfeb3f 100644
--- a/uppsrc/Core/Value.hpp
+++ b/uppsrc/Core/Value.hpp
@@ -244,11 +244,9 @@ inline const T& Value::To() const
 		if(x)
 			return x->Get();
 	}
-	else {
-		ASSERT(t < 255);
-		if(Is((byte)t))
-			return GetSmallRaw<T>();
-	}
+	else
+	if(t < 255 && Is((byte)t))
+		return GetSmallRaw<T>();
 	throw ValueTypeError(String().Cat() << "Invalid value conversion: "
 	                     << GetName() << " -> " << typeid(T).name(),
 	                     *this, t);