diff --git a/CMakeLists.txt b/CMakeLists.txt
index 15cbfaa..68c9fb9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,9 +3,8 @@ project (mraa)
 
 FIND_PACKAGE (Threads)
 
-set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -fno-omit-frame-pointer -DDEBUG")
+set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -fno-omit-frame-pointer")
 set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Wall")
-set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS} -DDEBUG")
 
 # Appends the cmake/modules path to MAKE_MODULE_PATH variable.
 set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})