diff --git a/pitest-entry/src/main/java/org/pitest/mutationtest/execute/MutationAnalysisExecutor.java b/pitest-entry/src/main/java/org/pitest/mutationtest/execute/MutationAnalysisExecutor.java
index 6a3ef7526..e5a4de94a 100644
--- a/pitest-entry/src/main/java/org/pitest/mutationtest/execute/MutationAnalysisExecutor.java
+++ b/pitest-entry/src/main/java/org/pitest/mutationtest/execute/MutationAnalysisExecutor.java
@@ -63,6 +63,8 @@ public void run(final List<MutationAnalysisUnit> testUnits) {
 
   private void processResult(List<Future<MutationMetaData>> results)
       throws InterruptedException, ExecutionException {
+    int countProcessedUnits = 0;
+
     for (final Future<MutationMetaData> f : results) {
       final MutationMetaData r = f.get();
       for (final MutationResultListener l : this.listeners) {
@@ -70,6 +72,12 @@ private void processResult(List<Future<MutationMetaData>> results)
           l.handleMutationResult(cr);
         }
       }
+
+      countProcessedUnits++;
+
+      if (countProcessedUnits % 100 == 0) {
+        LOG.info("Processed mutation unit " + countProcessedUnits + " of " + results.size() + ".");
+      }
     }
   }