diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/scanner/DefaultFileFilter.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/scanner/DefaultFileFilter.java
index 515f589595..1f1ea054f6 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/scanner/DefaultFileFilter.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/scanner/DefaultFileFilter.java
@@ -72,7 +72,7 @@ public class DefaultFileFilter implements FileFilter
   {
     if (excludes == null)
     {
-      excludes = Collections.emptySet();
+      this.excludes = Collections.emptySet();
     }
     else
     {