diff --git a/src/create-file-node.js b/src/create-file-node.js
index 1a696ddad1a73..d9eeef8f9cca3 100644
--- a/src/create-file-node.js
+++ b/src/create-file-node.js
@@ -18,9 +18,8 @@ exports.createFileNode = async (
     ...parsedSlashed,
     absolutePath: slashed,
     // Useful for limiting graphql query with certain parent directory
-    relativeDirectory: path.relative(
-      pluginOptions.path || process.cwd(),
-      parsedSlashed.dir
+    relativeDirectory: slash(
+      path.relative(pluginOptions.path || process.cwd(), parsedSlashed.dir)
     ),
   }