diff --git a/definitions/grib2/cfVarName.def b/definitions/grib2/cfVarName.def
index 35cf7c79a..b536a270d 100644
--- a/definitions/grib2/cfVarName.def
+++ b/definitions/grib2/cfVarName.def
@@ -3793,7 +3793,7 @@
 	 typeOfFirstFixedSurface = 187 ;
 	}
 #Urban canyon temperature
-'uct' = {
+'urct' = {
 	 discipline = 0 ;
 	 parameterCategory = 0 ;
 	 parameterNumber = 0 ;
@@ -3801,7 +3801,7 @@
 	 typeOfSecondFixedSurface = 185 ;
 	}
 #Urban canyon specific humidity
-'ucq' = {
+'urcq' = {
 	 discipline = 0 ;
 	 parameterCategory = 1 ;
 	 parameterNumber = 0 ;
diff --git a/definitions/grib2/shortName.def b/definitions/grib2/shortName.def
index 2f9975fcf..80baac219 100644
--- a/definitions/grib2/shortName.def
+++ b/definitions/grib2/shortName.def
@@ -3793,7 +3793,7 @@
 	 typeOfFirstFixedSurface = 187 ;
 	}
 #Urban canyon temperature
-'uct' = {
+'urct' = {
 	 discipline = 0 ;
 	 parameterCategory = 0 ;
 	 parameterNumber = 0 ;
@@ -3801,7 +3801,7 @@
 	 typeOfSecondFixedSurface = 185 ;
 	}
 #Urban canyon specific humidity
-'ucq' = {
+'urcq' = {
 	 discipline = 0 ;
 	 parameterCategory = 1 ;
 	 parameterNumber = 0 ;