diff --git a/jbake-core/src/main/java/org/jbake/app/FileUtil.java b/jbake-core/src/main/java/org/jbake/app/FileUtil.java
index c80dbf9e..ef1c2d17 100644
--- a/jbake-core/src/main/java/org/jbake/app/FileUtil.java
+++ b/jbake-core/src/main/java/org/jbake/app/FileUtil.java
@@ -328,6 +328,6 @@ public static boolean isFileInDirectory(File file, File directory) throws IOExce
         return (file.exists()
              && !file.isHidden()
              && directory.isDirectory()
-             && file.getCanonicalPath().startsWith(directory.getCanonicalPath()));
+             && file.getCanonicalFile().toPath().startsWith(directory.getCanonicalFile().toPath()));
     }
 }