1 files changed, 2 insertions, 1 deletions
diff --git a/io.c b/io.c
index 12d4e01c59..8a0a7de2a2 100644
--- a/io.c
+++ b/io.c
@@ -3799,7 +3799,8 @@ rb_f_open(int argc, VALUE *argv)
 	    redirect = Qtrue;
 	}
 	else {
-	    VALUE tmp = rb_check_string_type(argv[0]);
+	    VALUE tmp = argv[0];
+	    FilePathValue(tmp);
 	    if (NIL_P(tmp)) {
 		redirect = Qtrue;
 	    }