diff --git a/test/ref/test_gets.c b/test/ref/test_gets.c
index ee5b6fd588..7d7c18e3ae 100644
--- a/test/ref/test_gets.c
+++ b/test/ref/test_gets.c
@@ -31,7 +31,7 @@ char *argv[];
 {
     /* Fake stdin with the reference file */
     fclose(stdin);
-    stdin = fopen(INFILE, "r");
+    stdin = fopen(INFILE, "rb");
     if (stdin == NULL) {
         return EXIT_FAILURE;
     }