diff --git a/src/core/config/Config.cpp b/src/core/config/Config.cpp
index 88ddbb72..fb3fefac 100644
--- a/src/core/config/Config.cpp
+++ b/src/core/config/Config.cpp
@@ -160,7 +160,8 @@ bool xmrig::Config::finalize()
     const AlgoVariant av = getAlgoVariant();
     m_threads.mode = m_threads.count ? Simple : Automatic;
 
-    const size_t size = CpuThread::multiway(av) * cn_select_memory(m_algorithm.algo()) / 1024;
+    const Variant v = m_algorithm.variant();
+    const size_t size = CpuThread::multiway(av) * cn_select_memory(m_algorithm.algo(), v) / 1024;
 
     if (!m_threads.count) {
         m_threads.count = Cpu::info()->optimalThreadsCount(size, m_maxCpuUsage);
diff --git a/src/crypto/CryptoNight_constants.h b/src/crypto/CryptoNight_constants.h
index 1bc06a3b..4a66c16b 100644
--- a/src/crypto/CryptoNight_constants.h
+++ b/src/crypto/CryptoNight_constants.h
@@ -70,12 +70,12 @@ template<> inline constexpr size_t cn_select_memory<CRYPTONIGHT_HEAVY>() { retur
 template<> inline constexpr size_t cn_select_memory<CRYPTONIGHT_PICO>()  { return CRYPTONIGHT_PICO_MEMORY; }
 
 
-inline size_t cn_select_memory(Algo algorithm)
+inline size_t cn_select_memory(Algo algorithm, Variant v = VARIANT_AUTO)
 {
     switch(algorithm)
     {
     case CRYPTONIGHT:
-        return CRYPTONIGHT_MEMORY;
+        return (v == VARIANT_RX_WOW) ? CRYPTONIGHT_LITE_MEMORY : CRYPTONIGHT_MEMORY;
 
     case CRYPTONIGHT_LITE:
         return CRYPTONIGHT_LITE_MEMORY;