diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7386a5a775a373abc65aca67a7a7bd6ce515aecf..0b9925918ad93d927a85e82804d4112850a1dd79 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ project(stl_debug VERSION 0.1.0 LANGUAGES C CXX)
 
 set(CMAKE_CXX_STANDARD 17)
 
-set(default_build_type "Debug")
+set(CMAKE_BUILD_TYPE "Debug")
 
 INCLUDE_DIRECTORIES(
     include