diff --git a/src/atmos_spectral/model/spectral_dynamics.html b/src/atmos_spectral/model/spectral_dynamics.html
index f69670057..d787da48a 100644
--- a/src/atmos_spectral/model/spectral_dynamics.html
+++ b/src/atmos_spectral/model/spectral_dynamics.html
@@ -732,7 +732,7 @@ <H4>DIAGNOSTIC OUTPUT</H4>
 
              bk  vertical coordinate sigma values (dimensionless)
              pk  vertical coordinate pressure values (pascals)
-           surf  height of the surface (meters)
+          zsurf  geopotential height of the surface (meters)
              ps  surface pressure (pascals)
       pres_full  pressure at model full levels (pascals)
       pres_half  pressure at model half levels (pascals)