diff --git a/src/tools/Units.h b/src/tools/Units.h
index dd35cddbcfd18a7a436446f5cd58a094adf466da..79417eca1f5e836ba0f0e9cf9a5368560fde8816 100644
--- a/src/tools/Units.h
+++ b/src/tools/Units.h
@@ -59,15 +59,15 @@ public:
   Units();
 /// Set energy units from string.
 /// Also understands the following strings:
-/// kj/mol, kcal/mol, j/mol, and eV.
+/// kj/mol, kcal/mol, j/mol, eV, and Ha.
   void setEnergy(const std::string &);
 /// Set time units from string.
 /// Also understands the following strings:
-/// ps, ns, fs.
+/// ps, ns, fs, and atomic.
   void setTime(const std::string &);
 /// Set lengh units from string.
 /// Also understands the following strings:
-/// nm, A, um.
+/// nm, A, um, and Bohr.
   void setLength(const std::string &);
 /// Set charge units from string.
   void setCharge(const std::string &);