diff --git a/definitions/grib2/local.98.12.def b/definitions/grib2/local.98.12.def
index af7a66262..b2a78692b 100644
--- a/definitions/grib2/local.98.12.def
+++ b/definitions/grib2/local.98.12.def
@@ -17,5 +17,6 @@ alias mars.time = indexingTimeHHMM;
 
 # ECC-1425
 meta marsForecastMonth g1forecastmonth(dataDate, forecastTime): read_only;
+alias forecastMonth = marsForecastMonth;
 
 pad padding_loc12_1(50);