diff --git a/src/util/time.cpp b/src/util/time.cpp
--- a/src/util/time.cpp
+++ b/src/util/time.cpp
@@ -78,7 +78,7 @@
 std::string FormatISO8601DateTime(int64_t nTime) {
     struct tm ts;
     time_t time_val = nTime;
-#ifdef _MSC_VER
+#ifdef _WIN32
     gmtime_s(&ts, &time_val);
 #else
     gmtime_r(&time_val, &ts);
@@ -91,7 +91,7 @@
 std::string FormatISO8601Date(int64_t nTime) {
     struct tm ts;
     time_t time_val = nTime;
-#ifdef _MSC_VER
+#ifdef _WIN32
     gmtime_s(&ts, &time_val);
 #else
     gmtime_r(&time_val, &ts);