diff --git a/vendor/cryptopp/CMakeLists.txt b/vendor/cryptopp/CMakeLists.txt
index 99fade43..5fbf0741 100644
--- a/vendor/cryptopp/CMakeLists.txt
+++ b/vendor/cryptopp/CMakeLists.txt
@@ -17,7 +17,12 @@ if(NOT DISABLE_OPENMP)
         target_link_libraries(cryptopp PRIVATE -lomp)
     else()
         find_package(OpenMP)
+        if (NOT OpenMP_CXX_LIBRARIES)
+          # Older CMake didn't have OpenMP_CXX_LIBRARIES defined yet, but passed the library in OpenMP_CXX_FLAGS
+          set(OpenMP_CXX_LIBRARIES ${OpenMP_CXX_FLAGS})
+        endif()
         if(OPENMP_FOUND)
+            message(STATUS "Using OpenMP flags: ${OpenMP_CXX_FLAGS}")
             message(STATUS "Using OpenMP library: ${OpenMP_CXX_LIBRARIES}")
             set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
             target_link_libraries(cryptopp PRIVATE ${OpenMP_CXX_LIBRARIES})