diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index 8e918e176c5efde9ed4304a574d6f61c99f8fa8e..a7ef3d604d421c1b0265ce3a00ba3ee0a7d7eb16 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -329,9 +329,8 @@ int main(int argc, char *argv[]) {
           double const V = u4_diff[first_frictional_node].two_norm();
           double const state = (*s4_new)[first_frictional_node];
 
-          coefficient_writer << mu + a *std::log(V * eta) +
-                                    b * (state - std::log(eta * L))
-                             << std::endl;
+          coefficient_writer << (mu + a * std::log(V * eta) +
+                                 b * (state - std::log(eta * L))) << std::endl;
         }
       }