diff --git a/src/cat/TPTScriptInterface.cpp b/src/cat/TPTScriptInterface.cpp
index 43bb67b8d..34d1927c0 100644
--- a/src/cat/TPTScriptInterface.cpp
+++ b/src/cat/TPTScriptInterface.cpp
@@ -261,6 +261,9 @@ AnyType TPTScriptInterface::tptS_set(std::deque<std::string> * words)
 		newValue = GetParticleType(((StringType)value).Value());
 		if (newValue < 0 || newValue >= PT_NUM)
 		{
+			// TODO: add element CAKE to invalidate this
+			if (!strcasecmp(((StringType)value).Value().c_str(),"cake"))
+				throw GeneralException("Cake is a lie, not an element");
 			throw GeneralException("Invalid element");
 		}
 	}