diff --git a/src/USER-MISC/fix_rhok.cpp b/src/USER-MISC/fix_rhok.cpp
index 5cbc85a0d6ac60c9b9b14282d366c4a6a6146b01..7283323f2aa6cdbc7d49d3418bbb3c241264f141 100644
--- a/src/USER-MISC/fix_rhok.cpp
+++ b/src/USER-MISC/fix_rhok.cpp
@@ -1,7 +1,7 @@
 /*
  fix_rhoK_umbrella.cpp
  
- A fix to do umbrella sampling on rho(k).
+ A fix to do bias potential on rho(k).
  
  The usage is as follows: