1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index cb24b283d2..ebf5743d37 100644
--- a/io.c
+++ b/io.c
@@ -1678,7 +1678,7 @@ io_writev(int argc, VALUE *argv, VALUE io)
 static VALUE
 io_write_m(int argc, VALUE *argv, VALUE io)
 {
-    if (argc > 1) {
+    if (argc != 1) {
 	return io_writev(argc, argv, io);
     }
     else {