diff --git a/CMakeLists.txt b/CMakeLists.txt
index 67c7cafcc..f4edb1e12 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,8 +23,8 @@ project(Grappa)
 set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG")
 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG")
 
-set(CMAKE_C_FLAGS_DEBUG "-O1 -DDEBUG -g -DGUARD_PAGES_ON_STACK")
-set(CMAKE_CXX_FLAGS_DEBUG "-O1 -DDEBUG -g -DGUARD_PAGES_ON_STACK")
+set(CMAKE_C_FLAGS_DEBUG "-O0 -DDEBUG -g -DGUARD_PAGES_ON_STACK")
+set(CMAKE_CXX_FLAGS_DEBUG "-O0 -DDEBUG -g -DGUARD_PAGES_ON_STACK")
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 enable_testing()