diff --git a/CMakeLists.txt b/CMakeLists.txt
index 52b6fcecb9..c3e3b587f8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -342,3 +342,9 @@ endif()
 if(BUILD_BENCHMARK)
   add_subdirectory(bench)
 endif()
+
+get_directory_property(clean_files ADDITIONAL_CLEAN_FILES)
+list(APPEND clean_files "${OPEN_SRC_INSTALL_PREFIX}")
+list(APPEND clean_files "${CMAKE_CURRENT_SOURCE_DIR}/build")
+set_directory_properties(PROPERTIES ADDITIONAL_CLEAN_FILES "${clean_files}")
+
diff --git a/README.md b/README.md
index de73b31d6f..5d5a0d021a 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,8 @@ You can pass the following options to `cmake ..`.
 * `-DUNDEFINED_BEHAVIOR_SANITIZER` -- Build with UndefinedBehaviorSanitizer
 * `-DLINK_PROFILER` -- Link with gperftools (available profiler options are listed [here](https://github.com/gperftools/gperftools))
 
+To clean up the `open-source` and `build` folders from previous build, use `cmake --build . --target clean` from the `build` folder
+
 For windows builds, you will have to include additional flags for libwebsockets CMake. Add the following flags to your cmake command, or edit the CMake file in ./CMake/Dependencies/libwebsockets-CMakeLists.txt with the following:
 
 ```