diff --git a/nc_optimisation.cmake b/nc_optimisation.cmake
index 3c7117d..b42cd79 100644
--- a/nc_optimisation.cmake
+++ b/nc_optimisation.cmake
@@ -131,8 +131,8 @@ if (CMAKE_BUILD_TYPE MATCHES Debug)
     add_definitions(-DENABLE_DEBUGGING)
     add_definitions(-D_GLIBCXX_DEBUG)
 
-    #append_compile_flag(-Og)
-    append_compile_flag(-O0)
+    append_compile_flag(-Og)
+    #append_compile_flag(-O0)
     append_compile_flag(-Werror)
     # this was protected for xmingw32, find out why
     append_compile_flag(-fstack-protector)