diff --git a/build.zig b/build.zig
index e70fcd8..2220bbe 100644
--- a/build.zig
+++ b/build.zig
@@ -170,7 +170,8 @@ pub fn build(b: *std.Build) void {
         .name = "qjsc-host",
         .root_module = b.createModule(.{
             .target = b.graph.host,
-            .optimize = .Debug,
+            // https://github.com/allyourcodebase/quickjs/issues/1
+            .optimize = if (b.graph.host.result.os.tag == .windows) .ReleaseFast else .Debug,
         }),
     });