diff --git a/java/server/src/main/java/org/softwareheritage/graph/benchmark/ParallelBFS.java b/java/server/src/main/java/org/softwareheritage/graph/benchmark/ParallelBFS.java
index b595925..fd4189c 100644
--- a/java/server/src/main/java/org/softwareheritage/graph/benchmark/ParallelBFS.java
+++ b/java/server/src/main/java/org/softwareheritage/graph/benchmark/ParallelBFS.java
@@ -1,72 +1,76 @@
 package org.softwareheritage.graph.benchmark;
 
 import org.softwareheritage.graph.Graph;
 
 import com.martiansoftware.jsap.*;
 
 import it.unimi.dsi.big.webgraph.algo.ParallelBreadthFirstVisit;
 import it.unimi.dsi.logging.ProgressLogger;
 
 import java.io.IOException;
 
 
 public class ParallelBFS {
     private Graph graph;
 
     private void load_graph(String graphBasename) throws IOException {
         System.err.println("Loading graph " + graphBasename + " ...");
         this.graph = new Graph(graphBasename);
         System.err.println("Graph loaded.");
     }
 
     private static JSAPResult parse_args(String[] args) {
         JSAPResult config = null;
         try {
             SimpleJSAP jsap = new SimpleJSAP(
                 ParallelBFS.class.getName(),
                 "",
                 new Parameter[] {
                     new FlaggedOption("graphPath", JSAP.STRING_PARSER, JSAP.NO_DEFAULT, JSAP.REQUIRED,
                             'g', "graph", "Basename of the compressed graph"),
 
                     new FlaggedOption("numThreads", JSAP.INTEGER_PARSER, JSAP.NO_DEFAULT, JSAP.REQUIRED,
                             't', "numthreads", "Number of threads"),
+
+                    new FlaggedOption("useTransposed", JSAP.BOOLEAN_PARSER, "false", JSAP.NOT_REQUIRED,
+                            'T', "transposed", "Use transposed graph (default: false)"),
                 }
             );
 
             config = jsap.parse(args);
             if (jsap.messagePrinted()) {
                 System.exit(1);
             }
         } catch (JSAPException e) {
             e.printStackTrace();
         }
         return config;
     }
 
     public static void main(String[] args) {
         JSAPResult config = parse_args(args);
-
         String graphPath = config.getString("graphPath");
         int numThreads = config.getInt("numThreads");
+        boolean useTransposed = config.getBoolean("useTransposed");
+
         ProgressLogger logger = new ProgressLogger();
         long startTime;
         double totalTime;
 
 
         ParallelBFS bfs = new ParallelBFS();
         try {
             bfs.load_graph(graphPath);
         } catch (IOException e) {
             System.out.println("Could not load graph: " + e);
             System.exit(2);
         }
 
         ParallelBreadthFirstVisit visit =
-            new ParallelBreadthFirstVisit(bfs.graph.getBVGraph(false),
+            new ParallelBreadthFirstVisit(bfs.graph.getBVGraph(useTransposed),
                                           numThreads, true, logger);
         logger.start("Parallel BFS visit...");
         visit.visitAll();
         logger.done();
     }
 }