diff --git a/user-doc/Doxyfile b/user-doc/Doxyfile
index dbb2887b41e853fa5a5680818271abd9a5b37ed3..0b9674bcc108f299b2da85fb0b5000f80d61c268 100644
--- a/user-doc/Doxyfile
+++ b/user-doc/Doxyfile
@@ -233,7 +233,7 @@ ALIASES                = "hidden=\htmlonly <details> <summary> <b> To learn more
                          "endhidden=\htmlonly </div> </details> \endhtmlonly" \
                          "issue{1}=<a href=\"http://github.com/plumed/plumed2/issues/\1\">#\1</a>" \
                          "branch{1}=<a href=\"http://github.com/plumed/plumed2/commits/\1\">\1</a>" \
-                         "plumednotmaintained=\warning This branch is not maintained. Users are invited to upgrade to a newest version"
+                         "plumednotmaintained=\warning This branch is not maintained. Users are invited to upgrade to a newer version"
 
 # This tag can be used to specify a number of word-keyword mappings (TCL only).
 # A mapping has the form "name=value". For example adding "class=itcl::class"