diff --git a/posix.cc b/posix.cc
index 33000cc6..945c796c 100644
--- a/posix.cc
+++ b/posix.cc
@@ -106,7 +106,7 @@ int (fmt::BufferedFile::fileno)() const {
 
 fmt::File::File(fmt::StringRef path, int oflag) {
   int mode = S_IRUSR | S_IWUSR;
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__MINGW32__)
   fd_ = -1;
   FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
 #else
diff --git a/posix.h b/posix.h
index 5acf64c6..cbe2466e 100644
--- a/posix.h
+++ b/posix.h
@@ -63,7 +63,7 @@
 // Fix warnings about deprecated symbols.
 #  define FMT_POSIX_CALL(call) ::_##call
 # else
-#  define FMT_POSIX_CALL(call) ::call
+#  define FMT_POSIX_CALL(call) (::call)
 # endif
 #endif