diff --git a/definitions/grib2/cfVarName.def b/definitions/grib2/cfVarName.def
index a28afab73..c821ecb76 100644
--- a/definitions/grib2/cfVarName.def
+++ b/definitions/grib2/cfVarName.def
@@ -415,8 +415,8 @@
 	 scaleFactorOfLowerLimit = 0 ;
 	 productDefinitionTemplateNumber = 9 ;
 	}
-#Mean sea water temperature in the upper 300 m
-'mswt300m' = {
+#Mean sea water potential temperature in the upper 300 m
+'mswpt300m' = {
 	 discipline = 10 ;
 	 parameterCategory = 4 ;
 	 parameterNumber = 15 ;
diff --git a/definitions/grib2/name.def b/definitions/grib2/name.def
index fac993357..97df1c343 100644
--- a/definitions/grib2/name.def
+++ b/definitions/grib2/name.def
@@ -415,8 +415,8 @@
 	 probabilityType = 0 ;
 	 typeOfStatisticalProcessing = 10 ;
 	}
-#Mean sea water temperature in the upper 300 m
-'Mean sea water temperature in the upper 300 m' = {
+#Mean sea water potential temperature in the upper 300 m
+'Mean sea water potential temperature in the upper 300 m' = {
 	 discipline = 10 ;
 	 parameterCategory = 4 ;
 	 parameterNumber = 15 ;
diff --git a/definitions/grib2/paramId.def b/definitions/grib2/paramId.def
index dc2483fc9..e29db97ca 100644
--- a/definitions/grib2/paramId.def
+++ b/definitions/grib2/paramId.def
@@ -415,7 +415,7 @@
 	 probabilityType = 0 ;
 	 scaleFactorOfLowerLimit = 0 ;
 	}
-#Mean sea water temperature in the upper 300 m
+#Mean sea water potential temperature in the upper 300 m
 '151127' = {
 	 discipline = 10 ;
 	 parameterCategory = 4 ;
diff --git a/definitions/grib2/shortName.def b/definitions/grib2/shortName.def
index 3f447aef3..c23371233 100644
--- a/definitions/grib2/shortName.def
+++ b/definitions/grib2/shortName.def
@@ -415,8 +415,8 @@
 	 scaleFactorOfLowerLimit = 0 ;
 	 productDefinitionTemplateNumber = 9 ;
 	}
-#Mean sea water temperature in the upper 300 m
-'mswt300m' = {
+#Mean sea water potential temperature in the upper 300 m
+'mswpt300m' = {
 	 discipline = 10 ;
 	 parameterCategory = 4 ;
 	 parameterNumber = 15 ;
diff --git a/definitions/grib2/units.def b/definitions/grib2/units.def
index 4a8d90831..564ee1517 100644
--- a/definitions/grib2/units.def
+++ b/definitions/grib2/units.def
@@ -415,7 +415,7 @@
 	 probabilityType = 0 ;
 	 typeOfStatisticalProcessing = 10 ;
 	}
-#Mean sea water temperature in the upper 300 m
+#Mean sea water potential temperature in the upper 300 m
 'K' = {
 	 discipline = 10 ;
 	 parameterCategory = 4 ;