diff --git a/allocating_writer.zig b/allocating_writer.zig
index e5dd9964f9144c36dca79ae97f11cdb529e1f6bd..b2980f5d1c87259ef891588af7c10b2ea83c7128 100644
--- a/allocating_writer.zig
+++ b/allocating_writer.zig
@@ -4,6 +4,7 @@ const builtin = @import("builtin");
 
 const sys = switch (builtin.target.os.tag) {
     .linux => @import("sys-linux"),
+    .macos => @import("sys-darwin"),
     else => unreachable,
 };