diff --git a/CMakeLists.txt b/CMakeLists.txt
index 123bea70..84eebeb8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -171,6 +171,7 @@ endif()
 if (LWS_WITH_ESP32)
  set(LWS_WITH_SHARED OFF)
  set(LWS_WITH_SSL ON)
+ set(LWS_USE_MBEDTLS ON)
   # set(LWS_WITHOUT_CLIENT ON)
  set(LWS_WITHOUT_TESTAPPS ON)
  set(LWS_WITHOUT_EXTENSIONS ON)