diff --git a/definitions/grib2/cfVarName.def b/definitions/grib2/cfVarName.def
index 68a976c5b..23f21f92b 100644
--- a/definitions/grib2/cfVarName.def
+++ b/definitions/grib2/cfVarName.def
@@ -10262,6 +10262,12 @@
 	 parameterNumber = 108 ;
 	 typeOfFirstFixedSurface = 1 ;
 	}
+#Aerosol extinction coefficient
+'aerext' = {
+	 discipline = 0 ;
+	 parameterCategory = 20 ;
+	 parameterNumber = 105 ;
+	}
 #Pressure tendency
 'ptend' = {
 	 discipline = 0 ;
diff --git a/definitions/grib2/name.def b/definitions/grib2/name.def
index d79232bcc..28662c804 100644
--- a/definitions/grib2/name.def
+++ b/definitions/grib2/name.def
@@ -10262,6 +10262,12 @@
 	 parameterNumber = 108 ;
 	 typeOfFirstFixedSurface = 1 ;
 	}
+#Aerosol extinction coefficient
+'Aerosol extinction coefficient' = {
+	 discipline = 0 ;
+	 parameterCategory = 20 ;
+	 parameterNumber = 105 ;
+	}
 #Pressure tendency
 'Pressure tendency' = {
 	 discipline = 0 ;
diff --git a/definitions/grib2/paramId.def b/definitions/grib2/paramId.def
index e819eb5ab..79cac4f50 100644
--- a/definitions/grib2/paramId.def
+++ b/definitions/grib2/paramId.def
@@ -10262,6 +10262,12 @@
 	 parameterNumber = 108 ;
 	 typeOfFirstFixedSurface = 1 ;
 	}
+#Aerosol extinction coefficient
+'462000' = {
+	 discipline = 0 ;
+	 parameterCategory = 20 ;
+	 parameterNumber = 105 ;
+	}
 #Pressure tendency
 '3003' = {
 	 discipline = 0 ;
diff --git a/definitions/grib2/shortName.def b/definitions/grib2/shortName.def
index 3019ffd73..0069ad87e 100644
--- a/definitions/grib2/shortName.def
+++ b/definitions/grib2/shortName.def
@@ -10262,6 +10262,12 @@
 	 parameterNumber = 108 ;
 	 typeOfFirstFixedSurface = 1 ;
 	}
+#Aerosol extinction coefficient
+'aerext' = {
+	 discipline = 0 ;
+	 parameterCategory = 20 ;
+	 parameterNumber = 105 ;
+	}
 #Pressure tendency
 'ptend' = {
 	 discipline = 0 ;
diff --git a/definitions/grib2/units.def b/definitions/grib2/units.def
index 175168e60..fe33403b3 100644
--- a/definitions/grib2/units.def
+++ b/definitions/grib2/units.def
@@ -10262,6 +10262,12 @@
 	 parameterNumber = 108 ;
 	 typeOfFirstFixedSurface = 1 ;
 	}
+#Aerosol extinction coefficient
+'m**-1' = {
+	 discipline = 0 ;
+	 parameterCategory = 20 ;
+	 parameterNumber = 105 ;
+	}
 #Pressure tendency
 'Pa s**-1' = {
 	 discipline = 0 ;