diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0aa173c72799b9db728d3f607e0e767c77ad5c15..64dfa3c8fb90df071ae63e309e0fd4e143e370a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,7 @@ find_package(event)
 set(Swiften_DIR "${CMAKE_SOURCE_DIR}/cmake_modules")
 find_package(Swiften REQUIRED)
 
+set(openssl_DIR "${CMAKE_SOURCE_DIR}/cmake_modules")
 find_package(openssl REQUIRED)
 
 set(Boost_DIR "${CMAKE_SOURCE_DIR}/cmake_modules")