diff --git a/doc/src/fix_langevin.txt b/doc/src/fix_langevin.txt
index 07d8b274aa..49ecf96ff6 100644
--- a/doc/src/fix_langevin.txt
+++ b/doc/src/fix_langevin.txt
@@ -246,11 +246,11 @@ velocity given in "Gronbech-Jensen/Farago"_#Gronbech-Jensen; this velocity
 is shown to be systematically lower than the target temperature by a small
 amount, which grows quadratically with the timestep.
 The {gjf} option {vhalf} outputs the 2GJ half-step velocity given in
-"Gronbech Jensen/Gronbech-Jensen"_#2Gronbech-Jensen; this velocity is shown
-to not have any linear statistical errors for any stable time step.
+"Gronbech Jensen/Gronbech-Jensen"_#2Gronbech-Jensen; for linear systems,
+this velocity is shown to not have any statistical errors for any stable time step.
 An overview of statistically correct Boltzmann and Maxwell-Boltzmann
 sampling of true on-site and true half-step velocities is given in
-"Gronbech-Jensen_#1Gronbech-Jensen.
+"Gronbech-Jensen"_#1Gronbech-Jensen.
 Regardless of the choice of output velocity, the sampling of the configurational
 distribution of atom positions is the same, and linearly consistent with the
 target temperature.