diff --git a/CMake/CompilerFlags.cmake b/CMake/CompilerFlags.cmake
index 25d78a77..fffbb8f4 100644
--- a/CMake/CompilerFlags.cmake
+++ b/CMake/CompilerFlags.cmake
@@ -2,7 +2,7 @@ set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED on)
 set(CMAKE_CXX_EXTENSIONS off)
 set(CMAKE_BUILD_TYPE CACHE STRING Debug)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -DREALM_HAVE_CONFIG -DREALM_DEBUG")
 
 if(${CMAKE_GENERATOR} STREQUAL "Ninja")
     if(${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")