diff --git a/source/de/anomic/plasma/plasmaHTCache.java b/source/de/anomic/plasma/plasmaHTCache.java
index 18d083f85..83b9521b9 100644
--- a/source/de/anomic/plasma/plasmaHTCache.java
+++ b/source/de/anomic/plasma/plasmaHTCache.java
@@ -475,6 +475,13 @@ public final class plasmaHTCache {
         int p = s.indexOf("/");
         if (p < 0) p = s.indexOf("\\");
         if (p < 0) return null;
+        if (s.startsWith("tree") || s.startsWith("hash")) {
+            // remove prefix
+            s = s.substring(p + 1);
+            p = s.indexOf("/");
+            if (p < 0) p = s.indexOf("\\");
+            if (p < 0) return null;
+        }
         // remove the protokoll
         s = s.substring(p + 1);
         p = s.indexOf("/");