diff --git a/src/bias/External.cpp b/src/bias/External.cpp
index 6eb4c9ff32417bbb7d6a1c891bf7c4543ce4a7c2..c0da8689f05f3c3528535eca65e3dfca6853c8cb 100644
--- a/src/bias/External.cpp
+++ b/src/bias/External.cpp
@@ -56,8 +56,7 @@ The header in the file bias.dat should read:
 \endverbatim
 
 This should then be followed by the value of the potential and its derivative
-at 100 equally spaced points along the distance between 0 and 1. If you run
-with NOSPLINE you do not need to provide derivative information.
+at 100 equally spaced points along the distance between 0 and 1.
 
 You can also include grids that are a function of more than one collective
 variable.  For instance the following would be the input for an external