diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index ad585cda..8b235940 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -8,6 +8,7 @@ set(TORTURE_LIBRARY torture)
 
 include_directories(
   ${LIBSSH_PUBLIC_INCLUDE_DIRS}
+  ${OPENSSL_INCLUDE_DIR}
   ${CMOCKA_INCLUDE_DIR}
   ${ZLIB_INCLUDE_DIR}
   ${CMAKE_BINARY_DIR}