diff --git a/conv/aprob_fprob.cc b/conv/aprob_fprob.cc
index 5688945..aaf812e 100644
--- a/conv/aprob_fprob.cc
+++ b/conv/aprob_fprob.cc
@@ -88,7 +88,6 @@ static void Exec() {
         negative =
             std::accumulate(negatives.begin(), negatives.end(), 0.) /
             negative_sample;
-        std::cerr << negative << std::endl;
       }
 
       const auto prob = positive * (1-negative);