diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7b0af115..e04bd259f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,6 +72,10 @@ if (NOT MSVC)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse4.1")
     endif()
+
+    if (MINGW)
+        add_definitions(-DMINGW_HAS_SECURE_API)
+    endif()
 else()
     # Silence "deprecation" warnings
     add_definitions(/D_CRT_SECURE_NO_WARNINGS /D_CRT_NONSTDC_NO_DEPRECATE /D_SCL_SECURE_NO_WARNINGS)
diff --git a/src/common/file_util.cpp b/src/common/file_util.cpp
index b059e8be8..17af7c385 100644
--- a/src/common/file_util.cpp
+++ b/src/common/file_util.cpp
@@ -9,7 +9,6 @@
 #include "common/logging/log.h"
 
 #ifdef _WIN32
-    #include <share.h>
     #include <windows.h>
     #include <shlobj.h> // for SHGetFolderPath
     #include <shellapi.h>
@@ -928,11 +927,7 @@ bool IOFile::Open(const std::string& filename, const char openmode[])
 {
     Close();
 #ifdef _WIN32
-#if defined(__MINGW64__) && !defined(MINGW_HAS_SECURE_API)
-    m_file = _wfsopen(Common::UTF8ToUTF16W(filename).c_str(), Common::UTF8ToUTF16W(openmode).c_str(), SH_DENYNO);
-#else
     _wfopen_s(&m_file, Common::UTF8ToUTF16W(filename).c_str(), Common::UTF8ToUTF16W(openmode).c_str());
-#endif
 #else
     m_file = fopen(filename.c_str(), openmode);
 #endif
@@ -985,16 +980,10 @@ bool IOFile::Flush()
 bool IOFile::Resize(u64 size)
 {
     if (!IsOpen() || 0 !=
-
 #ifdef _WIN32
-#if defined(__MINGW64__) && !defined(MINGW_HAS_SECURE_API)
-        //TDM-GCC64 does not supports _chsize_s ?in <io_s.h>
-        _chsize(_fileno(m_file), size)
-#else
         // ector: _chsize sucks, not 64-bit safe
         // F|RES: changed to _chsize_s. i think it is 64-bit safe
         _chsize_s(_fileno(m_file), size)
-#endif
 #else
         // TODO: handle 64bit and growing
         ftruncate(fileno(m_file), size)
diff --git a/src/common/string_util.cpp b/src/common/string_util.cpp
index 37107f005..29bcb8381 100644
--- a/src/common/string_util.cpp
+++ b/src/common/string_util.cpp
@@ -52,7 +52,7 @@ bool CharArrayFromFormatV(char* out, int outsize, const char* format, va_list ar
 {
     int writtenCount;
 
-#if defined(_MSC_VER)
+#ifdef _MSC_VER
     // You would think *printf are simple, right? Iterate on each character,
     // if it's a format specifier handle it properly, etc.
     //
@@ -296,7 +296,7 @@ std::string ReplaceAll(std::string result, const std::string& src, const std::st
 
 std::string UTF16ToUTF8(const std::u16string& input)
 {
-#if _MSC_VER >= 1900 || defined(__MINGW64__)
+#if _MSC_VER >= 1900
     // Workaround for missing char16_t/char32_t instantiations in MSVC2015
     std::wstring_convert<std::codecvt_utf8_utf16<__int16>, __int16> convert;
     std::basic_string<__int16> tmp_buffer(input.cbegin(), input.cend());
@@ -309,7 +309,7 @@ std::string UTF16ToUTF8(const std::u16string& input)
 
 std::u16string UTF8ToUTF16(const std::string& input)
 {
-#if _MSC_VER >= 1900 || defined(__MINGW64__)
+#if _MSC_VER >= 1900
     // Workaround for missing char16_t/char32_t instantiations in MSVC2015
     std::wstring_convert<std::codecvt_utf8_utf16<__int16>, __int16> convert;
     auto tmp_buffer = convert.from_bytes(input);