diff --git a/compat/mingw.c b/compat/mingw.c
index 9e0f5e0ffb..10d67964ed 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -161,7 +161,7 @@ int mingw_open (const char *filename, int oflags, ...)
 	if (!strcmp(filename, "/dev/null"))
 		filename = "nul";
 
-	fd = open(filename, oflags, mode);
+	fd = open(filename, oflags | O_BINARY, mode);
 
 	if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
 		DWORD attrs = GetFileAttributes(filename);
@@ -354,7 +354,7 @@ int mkstemp(char *template)
 	char *filename = mktemp(template);
 	if (filename == NULL)
 		return -1;
-	return open(filename, O_RDWR | O_CREAT, 0600);
+	return open(filename, O_RDWR | O_CREAT | O_BINARY, 0600);
 }
 
 int gettimeofday(struct timeval *tv, void *tz)