diff --git a/CMakeLists.txt b/CMakeLists.txt
index d763e292e3..2fd4c0db65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -652,6 +652,7 @@ if(SDL_LEAN_AND_MEAN)
     PRIVATE
       SDL_LEAN_AND_MEAN
   )
+  set(HAVE_LEAN_AND_MEAN TRUE)
 endif()
 
 # Compiler option evaluation