diff --git a/src/colvar/Energy.cpp b/src/colvar/Energy.cpp
index 10e19d5cbe8a0c22ba43b8608e1ad15aff99d483..c0eee2b023881d0fdefa5fbdd1a13f464110d78a 100644
--- a/src/colvar/Energy.cpp
+++ b/src/colvar/Energy.cpp
@@ -32,7 +32,7 @@ namespace colvar {
 
 //+PLUMEDOC COLVAR ENERGY
 /*
-Calculate the total energy of the simulation box.
+Calculate the total potential energy of the simulation box.
 
 Total energy can be biased with umbrella sampling \cite bart-karp98jpcb or with well tempered metadynamics \cite Bonomi:2009p17935.