diff --git a/modules/ecs/src/uuid.cpp b/modules/ecs/src/uuid.cpp
index c84dd39..09a55cc 100644
--- a/modules/ecs/src/uuid.cpp
+++ b/modules/ecs/src/uuid.cpp
@@ -2,8 +2,10 @@
 
 namespace lt {
 
-auto UUID::s_engine = std::mt19937_64(std::random_device()());
-auto UUID::s_distribution = std::uniform_int_distribution<uint64_t> {};
+std::mt19937_64 UUID::s_engine = std::mt19937_64(std::random_device()());
+
+std::uniform_int_distribution<uint64_t>
+    UUID::s_distribution = std::uniform_int_distribution<uint64_t> {};
 
 UUID::UUID(uint64_t uuid /* = -1 */): m_uuid(uuid == -1 ? s_distribution(s_engine) : uuid)
 {