diff --git a/src/backend/common/Hashrate.cpp b/src/backend/common/Hashrate.cpp
index dedb74955..eb01a5fb0 100644
--- a/src/backend/common/Hashrate.cpp
+++ b/src/backend/common/Hashrate.cpp
@@ -30,6 +30,7 @@
 
 
 #include "backend/common/Hashrate.h"
+#include "base/io/json/Json.h"
 #include "base/tools/Chrono.h"
 #include "base/tools/Handle.h"
 #include "rapidjson/document.h"
@@ -157,13 +158,7 @@ const char *xmrig::Hashrate::format(double h, char *buf, size_t size)
 
 rapidjson::Value xmrig::Hashrate::normalize(double d)
 {
-    using namespace rapidjson;
-
-    if (!std::isnormal(d)) {
-        return Value(kNullType);
-    }
-
-    return Value(floor(d * 100.0) / 100.0);
+    return Json::normalize(d, false);
 }
 
 
diff --git a/src/base/api/Api.cpp b/src/base/api/Api.cpp
index c66241c9c..c4b2c5a7d 100644
--- a/src/base/api/Api.cpp
+++ b/src/base/api/Api.cpp
@@ -31,10 +31,11 @@
 #endif
 
 
-#include "3rdparty/http-parser/http_parser.h"
 #include "base/api/Api.h"
+#include "3rdparty/http-parser/http_parser.h"
 #include "base/api/interfaces/IApiListener.h"
 #include "base/api/requests/HttpApiRequest.h"
+#include "base/io/json/Json.h"
 #include "base/kernel/Base.h"
 #include "base/tools/Buffer.h"
 #include "base/tools/Chrono.h"
@@ -73,9 +74,10 @@ static rapidjson::Value getResources(rapidjson::Document &doc)
 
     double loadavg[3] = { 0.0 };
     uv_loadavg(loadavg);
-    load_average.PushBack(loadavg[0], allocator);
-    load_average.PushBack(loadavg[1], allocator);
-    load_average.PushBack(loadavg[2], allocator);
+
+    for (double value : loadavg) {
+        load_average.PushBack(Json::normalize(value, true), allocator);
+    }
 
     out.AddMember("memory",               memory, allocator);
     out.AddMember("load_average",         load_average, allocator);
@@ -182,6 +184,9 @@ void xmrig::Api::exec(IApiRequest &request)
 #       endif
 #       ifdef XMRIG_FEATURE_OPENCL
         features.PushBack("opencl", allocator);
+#       endif
+#       ifdef XMRIG_FEATURE_CUDA
+        features.PushBack("cuda", allocator);
 #       endif
         reply.AddMember("features", features, allocator);
     }
diff --git a/src/base/io/json/Json.cpp b/src/base/io/json/Json.cpp
index 9a5782933..738621448 100644
--- a/src/base/io/json/Json.cpp
+++ b/src/base/io/json/Json.cpp
@@ -28,6 +28,7 @@
 
 
 #include <cassert>
+#include <cmath>
 
 
 namespace xmrig {
@@ -154,6 +155,18 @@ unsigned xmrig::Json::getUint(const rapidjson::Value &obj, const char *key, unsi
 }
 
 
+rapidjson::Value xmrig::Json::normalize(double value, bool zero)
+{
+    using namespace rapidjson;
+
+    if (!std::isnormal(value)) {
+        return zero ? Value(0.0) : Value(kNullType);
+    }
+
+    return Value(floor(value * 100.0) / 100.0);
+}
+
+
 bool xmrig::JsonReader::isEmpty() const
 {
     return !m_obj.IsObject() || m_obj.ObjectEmpty();
diff --git a/src/base/io/json/Json.h b/src/base/io/json/Json.h
index 80fe5dc26..b5e2a3c8a 100644
--- a/src/base/io/json/Json.h
+++ b/src/base/io/json/Json.h
@@ -48,6 +48,8 @@ public:
 
     static bool get(const char *fileName, rapidjson::Document &doc);
     static bool save(const char *fileName, const rapidjson::Document &doc);
+
+    static rapidjson::Value normalize(double value, bool zero);
 };