diff --git a/datamodel.txt b/datamodel.txt
index 10d7f12..b4d2a1d 100644
--- a/datamodel.txt
+++ b/datamodel.txt
@@ -299,7 +299,7 @@ HDU #3          FITS binary table named "GUIDESTARS"
 
 The PDU contains the following keys:
 
-      DSGN_NAME Human-readable name for the design
+      DSGN_NAM  Human-readable name for the design
       RA        Intended telescope boresight Right Ascension (degrees)
       DEC       Intended telescope boresight Declination (degrees)
       POSANG    Intended Position Angle of the PFI (degrees).