diff --git a/potentials/charmm22.cmap b/potentials/charmm22.cmap
index f2560856bb..1097a85b8e 100644
--- a/potentials/charmm22.cmap
+++ b/potentials/charmm22.cmap
@@ -1,4 +1,4 @@
-# DATE: 2016-09-26 CONTRIBUTOR: Robert Latour, latourr@clemson.edu  CITATION: TBA
+# DATE: 2016-09-26 UNITS: real CONTRIBUTOR: Robert Latour, latourr@clemson.edu  CITATION: TBA
 # Title: charmm22/charmm27 dihedral correction map
 
 #  alanine map, type 1
diff --git a/potentials/charmm36.cmap b/potentials/charmm36.cmap
index c1e8166f95..9bf8625291 100644
--- a/potentials/charmm36.cmap
+++ b/potentials/charmm36.cmap
@@ -1,4 +1,4 @@
-# DATE: 2016-09-26 CONTRIBUTOR: Robert Latour, latourr@clemson.edu  CITATION: TBA
+# DATE: 2016-09-26 UNITS:real CONTRIBUTOR: Robert Latour, latourr@clemson.edu  CITATION: TBA
 # Title: charmm36 dihedral correction map
 
 #  alanine map, type 1