diff --git a/src/main.zig b/src/main.zig
index b65b666..d3ebcb4 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -61,6 +61,8 @@ pub const allocator = std.mem.Allocator{
     },
 };
 
+pub var io: std.Io = undefined;
+
 
 // Custom panic impl to reset the terminal before spewing out an error message.
 pub const panic = std.debug.FullPanic(struct {
@@ -331,7 +333,7 @@ fn tryReadArgsFile(path: [:0]const u8) void {
     defer f.close();
 
     var line_buf: [4096]u8 = undefined;
-    var line_rd = util.LineReader.init(f, &line_buf);
+    var line_rd = util.LineReader.init(io, f, &line_buf);
 
     while (true) {
         const line_ = (line_rd.read() catch |e|
@@ -464,6 +466,7 @@ fn readImport(path: [:0]const u8) !void {
 }
 
 pub fn main(init: std.process.Init) void {
+    io = init.io;
     ui.main_thread = std.Thread.getCurrentId();
 
     // Grab thousands_sep from the current C locale.