diff --git a/std/io.zig b/std/io.zig
index 93d50e67096766a1667c6edc72ffddadc2119b8c..7b72af15e439ff763b1b42f29e30be0c614a1f47 100644
--- a/std/io.zig
+++ b/std/io.zig
@@ -486,6 +486,11 @@ pub fn readLine(buf: []u8) !usize {
     while (true) {
         const byte = stream.readByte() catch return error.EndOfFile;
         switch (byte) {
+            '\r' => {
+                // trash the following \n
+                _ = stream.readByte() catch return error.EndOfFile;
+               return index;
+            },
             '\n' => return index,
             else => {
                 if (index == buf.len) return error.InputTooLong;