diff --git a/doc/dihedral_charmm.html b/doc/dihedral_charmm.html
index 6b993935f3..8030eab9ea 100644
--- a/doc/dihedral_charmm.html
+++ b/doc/dihedral_charmm.html
@@ -89,6 +89,6 @@ Spellmeyer, Fox, Caldwell, Kollman, JACS 117, 5179-5197 (1995).
 <A NAME = "MacKerell"></A>
 
 <P><B>(MacKerell)</B> MacKerell, Bashford, Bellott, Dunbrack, Evanseck, Field,
-Fischer, Gao, Guo, Ha, et al, J Phys Chem, 102, 3586 (1998).
+Fischer, Gao, Guo, Ha, et al, J Phys Chem B, 102, 3586 (1998).
 </P>
 </HTML>
diff --git a/doc/dihedral_charmm.txt b/doc/dihedral_charmm.txt
index 5fd476220f..d164f369ca 100644
--- a/doc/dihedral_charmm.txt
+++ b/doc/dihedral_charmm.txt
@@ -84,4 +84,4 @@ Spellmeyer, Fox, Caldwell, Kollman, JACS 117, 5179-5197 (1995).
 
 :link(MacKerell)
 [(MacKerell)] MacKerell, Bashford, Bellott, Dunbrack, Evanseck, Field,
-Fischer, Gao, Guo, Ha, et al, J Phys Chem, 102, 3586 (1998).
+Fischer, Gao, Guo, Ha, et al, J Phys Chem B, 102, 3586 (1998).