diff --git a/README.md b/README.md
index 5884cee8..151bea93 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ After the run completes, you will see an output direcotry `output.zarr`. An exam
 ### Environment variable configuration
 
 - `PACE_CONSTANTS`: Pace is bundled with various constants (see _util/pace/util/constants.py_).
-  - `FV3DYCORE` NOAA's FV3 dynamical core constants (original port)
+  - `GFDL` NOAA's FV3 dynamical core constants (original port)
   - `GFS` Constant as defined in NOAA GFS
   - `GEOS`  Constant as defined in GEOS v13
 - `PACE_FLOAT_PRECISION`: default precision of the field & scalars in the numerics. Default to 64.
diff --git a/util/pace/util/constants.py b/util/pace/util/constants.py
index d5485aea..a470581d 100644
--- a/util/pace/util/constants.py
+++ b/util/pace/util/constants.py
@@ -8,7 +8,7 @@
 # package and the other used for the Dycore. Their difference are small but significant
 # In addition the GSFC's GEOS model as its own variables
 class ConstantVersions(Enum):
-    FV3DYCORE = "FV3DYCORE"  # NOAA's FV3 dynamical core constants (original port)
+    GFDL = "GFDL"  # NOAA's FV3 dynamical core constants (original port)
     GFS = "GFS"  # Constant as defined in NOAA GFS
     GEOS = "GEOS"  # Constant as defined in GEOS v13
 
@@ -66,9 +66,7 @@ class ConstantVersions(Enum):
 if CONST_VERSION == ConstantVersions.GEOS:
     # 'qlcd' is exchanged in GEOS
     NQ = 9
-elif (
-    CONST_VERSION == ConstantVersions.GFS or CONST_VERSION == ConstantVersions.FV3DYCORE
-):
+elif CONST_VERSION == ConstantVersions.GFS or CONST_VERSION == ConstantVersions.GFDL:
     NQ = 8
 else:
     raise RuntimeError("Constant selector failed, bad code.")
@@ -104,7 +102,7 @@ class ConstantVersions(Enum):
     KAPPA = RDGAS / CP_AIR  # Specific heat capacity of dry air at
     TFREEZE = 273.15
     SAT_ADJUST_THRESHOLD = 1.0e-8
-elif CONST_VERSION == ConstantVersions.FV3DYCORE:
+elif CONST_VERSION == ConstantVersions.GFDL:
     RADIUS = 6371.0e3  # Radius of the Earth [m] #6371.0e3
     PI = 3.14159265358979323846  # 3.14159265358979323846
     OMEGA = 7.292e-5  # Rotation of the earth  # 7.292e-5