diff --git a/definitions/grib1/localConcepts/ecmf/cfVarName.def b/definitions/grib1/localConcepts/ecmf/cfVarName.def
index 8d23708dd..ad1a43797 100644
--- a/definitions/grib1/localConcepts/ecmf/cfVarName.def
+++ b/definitions/grib1/localConcepts/ecmf/cfVarName.def
@@ -3674,17 +3674,17 @@
 	 table2Version = 162 ;
 	 indicatorOfParameter = 141 ;
 	}
-#Standardised precipitation index valid for 3 months
+#Standardised precipitation index valid for the last 3 months
 'spi03' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 1 ;
 	}
-#Standardised precipitation index valid for 6 months
+#Standardised precipitation index valid for the last 6 months
 'spi06' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 2 ;
 	}
-#Standardised precipitation index valid for 12 months
+#Standardised precipitation index valid for the last 12 months
 'spi12' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 3 ;
diff --git a/definitions/grib1/localConcepts/ecmf/name.def b/definitions/grib1/localConcepts/ecmf/name.def
index b500f5e60..e55894d91 100644
--- a/definitions/grib1/localConcepts/ecmf/name.def
+++ b/definitions/grib1/localConcepts/ecmf/name.def
@@ -3674,18 +3674,18 @@
 	 table2Version = 162 ;
 	 indicatorOfParameter = 141 ;
 	}
-#Standardised precipitation index valid for 3 months
-'Standardised precipitation index valid for 3 months' = {
+#Standardised precipitation index valid for the last 3 months
+'Standardised precipitation index valid for the last 3 months' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 1 ;
 	}
-#Standardised precipitation index valid for 6 months
-'Standardised precipitation index valid for 6 months' = {
+#Standardised precipitation index valid for the last 6 months
+'Standardised precipitation index valid for the last 6 months' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 2 ;
 	}
-#Standardised precipitation index valid for 12 months
-'Standardised precipitation index valid for 12 months' = {
+#Standardised precipitation index valid for the last 12 months
+'Standardised precipitation index valid for the last 12 months' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 3 ;
 	}
diff --git a/definitions/grib1/localConcepts/ecmf/paramId.def b/definitions/grib1/localConcepts/ecmf/paramId.def
index 7e1f22add..8244d99a4 100644
--- a/definitions/grib1/localConcepts/ecmf/paramId.def
+++ b/definitions/grib1/localConcepts/ecmf/paramId.def
@@ -3674,17 +3674,17 @@
 	 table2Version = 162 ;
 	 indicatorOfParameter = 141 ;
 	}
-#Standardised precipitation index valid for 3 months
+#Standardised precipitation index valid for the last 3 months
 '170001' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 1 ;
 	}
-#Standardised precipitation index valid for 6 months
+#Standardised precipitation index valid for the last 6 months
 '170002' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 2 ;
 	}
-#Standardised precipitation index valid for 12 months
+#Standardised precipitation index valid for the last 12 months
 '170003' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 3 ;
diff --git a/definitions/grib1/localConcepts/ecmf/shortName.def b/definitions/grib1/localConcepts/ecmf/shortName.def
index 0f25fae6e..ba74a4d51 100644
--- a/definitions/grib1/localConcepts/ecmf/shortName.def
+++ b/definitions/grib1/localConcepts/ecmf/shortName.def
@@ -3674,17 +3674,17 @@
 	 table2Version = 162 ;
 	 indicatorOfParameter = 141 ;
 	}
-#Standardised precipitation index valid for 3 months
+#Standardised precipitation index valid for the last 3 months
 'spi03' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 1 ;
 	}
-#Standardised precipitation index valid for 6 months
+#Standardised precipitation index valid for the last 6 months
 'spi06' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 2 ;
 	}
-#Standardised precipitation index valid for 12 months
+#Standardised precipitation index valid for the last 12 months
 'spi12' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 3 ;
diff --git a/definitions/grib1/localConcepts/ecmf/units.def b/definitions/grib1/localConcepts/ecmf/units.def
index 6ca99ce32..48c1d03c0 100644
--- a/definitions/grib1/localConcepts/ecmf/units.def
+++ b/definitions/grib1/localConcepts/ecmf/units.def
@@ -3674,17 +3674,17 @@
 	 table2Version = 162 ;
 	 indicatorOfParameter = 141 ;
 	}
-#Standardised precipitation index valid for 3 months
+#Standardised precipitation index valid for the last 3 months
 'dimensionless' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 1 ;
 	}
-#Standardised precipitation index valid for 6 months
+#Standardised precipitation index valid for the last 6 months
 'dimensionless' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 2 ;
 	}
-#Standardised precipitation index valid for 12 months
+#Standardised precipitation index valid for the last 12 months
 'dimensionless' = {
 	 table2Version = 170 ;
 	 indicatorOfParameter = 3 ;