diff --git a/tools/chunks/catchunks/pipeline-interests-aimd.cpp b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
index 0292714..e32a36d 100644
--- a/tools/chunks/catchunks/pipeline-interests-aimd.cpp
+++ b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
@@ -33,7 +33,7 @@
 namespace ndn {
 namespace chunks {
 
-PipelineInterestsAimd::PipelineInterestsAimd(Face& face, RttEstimator& rttEstimator,
+PipelineInterestsAimd::PipelineInterestsAimd(Face& face, RttEstimatorWithStats& rttEstimator,
                                              const Options& options)
   : PipelineInterestsAdaptive(face, rttEstimator, options)
 {