diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd1419a..4102896 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,6 +39,8 @@ endif()
 
 option( UNITY_BUILD OFF )
 
+FIND_PACKAGE( OpenSSL )
+
 include_directories( vendor/boost/process/include )
 include_directories( ${Boost_INCLUDE_DIR} )
 include_directories( ${OPENSSL_INCLUDE_DIR} )