--- a/core/src/luan/impl/UnmExpr.java	Tue Mar 29 18:09:51 2016 -0600
+++ b/core/src/luan/impl/UnmExpr.java	Tue Mar 29 19:58:39 2016 -0600
@@ -23,6 +23,6 @@
 				return Luan.first(fn.call(luan,new Object[]{o}));
 			}
 		}
-		throw new LuanException(luan,"attempt to perform arithmetic on a "+Luan.type(o)+" value");
+		throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value");
 	}
 }