diff --git a/tools/audiofile/audiofile.cpp b/tools/audiofile/audiofile.cpp
index 163237b5..459bc33e 100644
--- a/tools/audiofile/audiofile.cpp
+++ b/tools/audiofile/audiofile.cpp
@@ -8243,7 +8243,7 @@ File *File::open(const char *path, File::AccessMode mode)
 		flags = O_RDONLY;
 	else if (mode == WriteAccess)
 		flags = O_CREAT | O_WRONLY | O_TRUNC;
-#if defined(WIN32) || defined(__CYGWIN__)
+#if defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__)
 	flags |= O_BINARY;
 #endif
 	int fd = ::open(path, flags, 0666);