diff --git a/plugin/index.ts b/plugin/index.ts
index c3a8a07..55313d9 100644
--- a/plugin/index.ts
+++ b/plugin/index.ts
@@ -290,7 +290,9 @@ export const visualizer = (
       });
 
       if (opts.emitFile) {
-        if (path.isAbsolute(filename) || filename.startsWith(".")) {
+        // Regex checks for filenames starting with `./`, `../`, `.\` or `..\`
+        // to account for windows-style path separators
+        if (path.isAbsolute(filename) ||  /^\.{1,2}[/\\]/.test(filename)) {
           this.error(ERR_FILENAME_EMIT);
         }
         this.emitFile({