diff --git a/posix.cc b/posix.cc
index 7aca1a86..f41f4341 100644
--- a/posix.cc
+++ b/posix.cc
@@ -98,7 +98,7 @@ void fmt::BufferedFile::close() {
     throw SystemError(errno, "cannot close file");
 }
 
-int (fmt::BufferedFile::fileno)() const {
+int fmt::BufferedFile::fileno() const {
   int fd = FMT_POSIX_CALL(fileno(file_));
   if (fd == -1)
     throw SystemError(errno, "cannot get file descriptor");
diff --git a/posix.h b/posix.h
index 5acf64c6..70a0db1a 100644
--- a/posix.h
+++ b/posix.h
@@ -46,7 +46,7 @@
 #endif
 
 #ifndef FMT_POSIX
-# ifdef _WIN32
+# if defined(_WIN32) && !defined(__MINGW32__)
 // Fix warnings about deprecated symbols.
 #  define FMT_POSIX(call) _##call
 # else