diff --git a/src/netbase.cpp b/src/netbase.cpp
index 4b63757f3d644..093fd0bdb7880 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -17,6 +17,8 @@
 
 #ifndef WIN32
 #include <fcntl.h>
+#else
+#include <codecvt>
 #endif
 
 #if !defined(MSG_NOSIGNAL)
@@ -649,13 +651,13 @@ bool LookupSubNet(const char* pszName, CSubNet& ret)
 #ifdef WIN32
 std::string NetworkErrorString(int err)
 {
-    char buf[256];
+    wchar_t buf[256];
     buf[0] = 0;
-    if(FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK,
+    if(FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK,
             nullptr, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-            buf, sizeof(buf), nullptr))
+            buf, ARRAYSIZE(buf), nullptr))
     {
-        return strprintf("%s (%d)", buf, err);
+        return strprintf("%s (%d)", std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>,wchar_t>().to_bytes(buf), err);
     }
     else
     {
diff --git a/src/util.cpp b/src/util.cpp
index 84a4adcfd42e7..a844b4a2484a3 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -997,7 +997,7 @@ void CreatePidFile(const fs::path &path, pid_t pid)
 bool RenameOver(fs::path src, fs::path dest)
 {
 #ifdef WIN32
-    return MoveFileExA(src.string().c_str(), dest.string().c_str(),
+    return MoveFileExW(src.wstring().c_str(), dest.wstring().c_str(),
                        MOVEFILE_REPLACE_EXISTING) != 0;
 #else
     int rc = std::rename(src.string().c_str(), dest.string().c_str());