diff --git a/CMakeLists.txt b/CMakeLists.txt
index 16fa5aa9e2..f2f233b249 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,8 @@ set(PROJECT_VERSION "5.26.80") # Handled by release scripts
 project(KWin VERSION ${PROJECT_VERSION})
 
 set(CMAKE_C_STANDARD 99)
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 set(QT_MIN_VERSION "5.15.2")
 set(KF5_MIN_VERSION "5.98.0")
@@ -81,9 +83,6 @@ add_definitions(-DMESA_EGL_NO_X11_HEADERS)
 add_definitions(-DEGL_NO_X11)
 add_definitions(-DEGL_NO_PLATFORM_SPECIFIC_TYPES)
 
-set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 # required frameworks by Core
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     Auth