diff --git a/scripts/icu.mjs b/scripts/icu.mjs
index 9b20ad30..811ace34 100644
--- a/scripts/icu.mjs
+++ b/scripts/icu.mjs
@@ -54,5 +54,5 @@ export const fetchIcu = async () => {
   })
 
   // Return the relative path to the ICU data from the project root
-  return path.relative(path.join(__dirname, '../'), icuDat)
+  return path.relative(path.join(__dirname, '../'), icuDat).replace(/\\/g, '/')
 }