diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58851cf..5d60070 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 2.6)

 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/Modules/")

-set(CMAKE_C_FLAGS "-Wall -O3 -g")
+set(CMAKE_C_FLAGS "-Wall -O0 -g")

 add_subdirectory (lib)
 add_subdirectory (examples)