diff --git a/src/workers/Workers.cpp b/src/workers/Workers.cpp
index d77bf681..4564bec8 100644
--- a/src/workers/Workers.cpp
+++ b/src/workers/Workers.cpp
@@ -213,7 +213,7 @@ void Workers::soft_stop() // stop current workers leaving uv stuff intact (used
 }
 
 // setups workers based on specified algorithm (or its basic perf algo more specifically)
-void Workers::switch_algo(const xmrig::Algorithm algorithm)
+void Workers::switch_algo(const xmrig::Algorithm& algorithm)
 {
     if (m_status.algo == algorithm.algo()) return;
 
diff --git a/src/workers/Workers.h b/src/workers/Workers.h
index 8cfd02d8..058564e3 100644
--- a/src/workers/Workers.h
+++ b/src/workers/Workers.h
@@ -58,7 +58,7 @@ public:
     static void setJob(const Job &job, bool donate);
     static void start(xmrig::Controller *controller);
     // setups workers based on specified algorithm (or its basic perf algo more specifically)
-    static void switch_algo(xmrig::Algorithm);
+    static void switch_algo(const xmrig::Algorithm&);
     static void stop();
     static void submit(const JobResult &result);