diff --git a/src/crypto/rx/RxConfig.cpp b/src/crypto/rx/RxConfig.cpp
index 2318bfbe..ef823e60 100644
--- a/src/crypto/rx/RxConfig.cpp
+++ b/src/crypto/rx/RxConfig.cpp
@@ -74,5 +74,5 @@ xmrig::RxConfig::Mode xmrig::RxConfig::readMode(const rapidjson::Value &value) c
         }
     }
 
-    return LightMode;
+    return AutoMode;
 }
diff --git a/src/crypto/rx/RxDataset.cpp b/src/crypto/rx/RxDataset.cpp
index fb2ef9d1..ce41a58e 100644
--- a/src/crypto/rx/RxDataset.cpp
+++ b/src/crypto/rx/RxDataset.cpp
@@ -167,7 +167,7 @@ void xmrig::RxDataset::allocate(bool hugePages)
         return;
     }
 
-    if (m_mode == RxConfig::AutoMode && uv_get_free_memory() < (maxSize() + RxCache::maxSize())) {
+    if (m_mode == RxConfig::AutoMode && uv_get_total_memory() < (maxSize() + RxCache::maxSize())) {
         LOG_ERR(CLEAR "%s" RED_BOLD_S "not enough memory for RandomX dataset", rx_tag());
 
         return;