--- CMakeLists.txt.orig	2025-09-23 16:25:43.000000000 +0800
+++ CMakeLists.txt	2025-10-09 10:10:00.000000000 +0800
@@ -42,7 +42,8 @@
 option(ENABLE_DEBUG_LOGS "Turn on or off debug level logs." NO)
 option(ENABLE_PACKAGE_SOURCE "Create 'package_source' target for source archive making" OFF)
 set(WITH_THREAD_STACK_SIZE "0" CACHE STRING "Set thread stack size (0 is the OS default).")
-
+# This is a transitive dependency from bctoolbox, but CMake cannot find it otherwise.
+option(ENABLE_OPENSSL "Use OpenSSL." NO)
 
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
 
@@ -108,6 +109,10 @@
 )
 
 
+if(ENABLE_OPENSSL)
+	find_package(OpenSSL REQUIRED)
+endif()
+
 set(ORTP_CPPFLAGS)
 if(ENABLE_PERF)
 	set(PERF 1)