diff --git a/bin/base64.c b/bin/base64.c
index 42689d3..7428c7f 100644
--- a/bin/base64.c
+++ b/bin/base64.c
@@ -32,6 +32,8 @@
 // Include the Windows API.
 #ifdef WIN
 #  include <windows.h>
+#  include <io.h>
+#  include <fcntl.h>
 #endif
 
 #include "../include/libbase64.h"
@@ -359,10 +361,9 @@ encode_inner (const struct config *config, struct buffer *buf)
 static bool
 encode (const struct config *config, struct buffer *buf)
 {
-	if (freopen(NULL, "wb", stdout) == 0) {
-		fprintf(stderr, "freopen(stdout)\n");
-		return false;
-	}
+#ifdef WIN
+	_setmode(1, _O_BINARY);
+#endif
 
 	const bool ret = encode_inner(config, buf);