diff --git a/posix.cc b/posix.cc
index 4c086af6..33000cc6 100644
--- a/posix.cc
+++ b/posix.cc
@@ -97,7 +97,7 @@ 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/test/gtest-extra-test.cc b/test/gtest-extra-test.cc
index 60cfcc89..3ba219a5 100644
--- a/test/gtest-extra-test.cc
+++ b/test/gtest-extra-test.cc
@@ -36,6 +36,10 @@
 # include <crtdbg.h>  // for _CrtSetReportMode
 #endif  // _WIN32
 
+#ifdef __MINGW32__
+# undef fileno
+#endif
+
 namespace {
 
 #if defined(_WIN32) && !defined(__MINGW32__)