--- a/stage3/constant_folding.cc	Tue Jun 19 11:23:30 2012 +0100
+++ b/stage3/constant_folding.cc	Tue Jun 19 18:55:43 2012 +0100
@@ -719,7 +719,7 @@
 	symbol->l_exp->accept(*this);
 	symbol->r_exp->accept(*this);
 	DO_BINARY_OPER(  bool, ||, bool);
-	DO_BINARY_OPER(uint64, | , bool);
+	DO_BINARY_OPER(uint64, | , uint64);
 	return NULL;
 }