1 files changed, 7 insertions, 0 deletions
diff --git a/src/expr/node.h b/src/expr/node.h
index b7c4b3ad8..1c0646556 100644
--- a/src/expr/node.h
+++ b/src/expr/node.h
@@ -100,6 +100,13 @@ public:
 
 };/* class TypeCheckingExceptionPrivate */
 
+class UnknownTypeException : public TypeCheckingExceptionPrivate {
+public:
+
+  UnknownTypeException(NodeTemplate<false> node) throw();
+
+};/* class UnknownTypeException */
+
 /**
  * \typedef NodeTemplate<true> Node;
  *