diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6b2e9b83..4d52a72d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,9 +21,11 @@ option(MI_BUILD_OBJECT      "Build object library" ON)
 option(MI_BUILD_TESTS       "Build test executables" ON)
 option(MI_DEBUG_TSAN        "Build with thread sanitizer (needs clang)" OFF)
 option(MI_DEBUG_UBSAN       "Build with undefined-behavior sanitizer (needs clang++)" OFF)
+
+# deprecated options
 option(MI_CHECK_FULL        "Use full internal invariant checking in DEBUG mode (deprecated, use MI_DEBUG_FULL instead)" OFF)
-option(MI_INSTALL_TOPLEVEL  "Install directly into $CMAKE_INSTALL_PREFIX instead of PREFIX/lib/mimalloc-version" OFF)
-option(MI_USE_LIBATOMIC     "Explicitly link with -latomic (on older systems)" OFF)
+option(MI_INSTALL_TOPLEVEL  "Install directly into $CMAKE_INSTALL_PREFIX instead of PREFIX/lib/mimalloc-version (deprecated)" OFF)
+option(MI_USE_LIBATOMIC     "Explicitly link with -latomic (on older systems) (deprecated and detected automatically)" OFF)
 
 include(GNUInstallDirs)
 include("cmake/mimalloc-config-version.cmake")