diff --git a/src/main/java/nl/hsac/fitnesse/fixture/slim/FileFixture.java b/src/main/java/nl/hsac/fitnesse/fixture/slim/FileFixture.java
index <HASH>..<HASH> 100644
--- a/src/main/java/nl/hsac/fitnesse/fixture/slim/FileFixture.java
+++ b/src/main/java/nl/hsac/fitnesse/fixture/slim/FileFixture.java
@@ -94,7 +94,7 @@ public class FileFixture extends SlimFixtureWithMap {
     private String cleanupPath(String fullPath) {
         String clean;
         if ("\\".equals(File.separator)) {
-            clean = fullPath.replaceAll("/", File.separator);
+            clean = fullPath.replaceAll("/", "\\\\");
         } else {
             clean = fullPath.replaceAll("\\\\", File.separator);
         }
Fix replacement for / to Windows \ regex escaped