diff --git a/CMakeLists.txt b/CMakeLists.txt
index d413a97..42e1baf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,8 @@
 project(Monicelli)
 cmake_minimum_required(VERSION 2.8)
 
+set(CMAKE_BUILD_TYPE Release)
+
 message("== Only a limited set of platforms was tested. We need your help!")
 message("== Report build errors to https://github.com/esseks/monicelli/issues")
 
@@ -87,7 +89,7 @@ include_directories(
 
 add_definitions(
     -Wall -Wextra -Werror -Wno-unused-parameter -Wno-deprecated-register
-    -std=c++0x -DYYDEBUG=0 -O2
+    -std=c++0x -DYYDEBUG=0
 )
 
 bison_target(Parser Monicelli.ypp ${CMAKE_CURRENT_BINARY_DIR}/Parser.cpp)