diff --git a/definitions/grib2/templates/template.4.statistical.def b/definitions/grib2/templates/template.4.statistical.def
index fde76eba3..6d1da3de4 100644
--- a/definitions/grib2/templates/template.4.statistical.def
+++ b/definitions/grib2/templates/template.4.statistical.def
@@ -55,7 +55,7 @@ if (numberOfTimeRanges == 1 || numberOfTimeRanges == 2) {
   concept stepTypeInternal {
     "instant" = {typeOfStatisticalProcessing=255;}
     "avg"     = {typeOfStatisticalProcessing=0;}
-    "avgd"    = {typeOfStatisticalProcessing=0;typeOfTimeIncrement=1;}
+    "avgd"    = {significaneOfReferenceTime=1;typeOfStatisticalProcessing=0;typeOfTimeIncrement=1;}
     "accum"   = {typeOfStatisticalProcessing=1;}
     "max"     = {typeOfStatisticalProcessing=2;}
     "min"     = {typeOfStatisticalProcessing=3;}