diff --git a/CMakeLists.txt b/CMakeLists.txt
index fbce6c8..902f126 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 2.8.4)
 
 project(tinyexpr)
 
+option(TE_POW_FROM_RIGHT "Evaluate exponents from right to left." OFF)
+option(TE_NAT_LOG "Define the log function as natural logarithm." OFF)
 option(build_tinyexpr_test "Build TinyExpr tests." OFF)
 option(build_tinyexpr_test_pr "Build TinyExpr tests PR." OFF)
 option(build_tinyexpr_bench "Build TinyExpr benchmark." OFF)