diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e0810bc..c8d3b89 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -36,6 +36,9 @@ else()
 	set(LIBS ${LIBS} randomx)
 endif()
 
+add_subdirectory(../external/src/mx25519 mx25519)
+set(LIBS ${LIBS} mx25519)
+
 add_definitions(-DWITH_RANDOMX)
 add_definitions(-DWITH_MERGE_MINING_DONATION)
 
@@ -119,6 +122,7 @@ include_directories(../external/src/protobuf-c)
 include_directories(../external/src/RandomX/src)
 include_directories(../external/src/rapidjson/include)
 include_directories(../external/src/robin-hood-hashing/src/include)
+include_directories(../external/src/mx25519)
 include_directories(src)
 include_directories(googletest/googletest/include)