diff --git a/definitions/grib2/template.4.statistical.def b/definitions/grib2/template.4.statistical.def
index c9307b04e..3d7d7326f 100644
--- a/definitions/grib2/template.4.statistical.def
+++ b/definitions/grib2/template.4.statistical.def
@@ -56,8 +56,10 @@ if (numberOfTimeRange == 1 || numberOfTimeRange == 2) {
     "instant" = {typeOfStatisticalProcessing=255;}
     "avg"     = {typeOfStatisticalProcessing=0;typeOfTimeIncrement=2;}
     "avg"     = {typeOfStatisticalProcessing=0;typeOfTimeIncrement=3;}
+    "avg"     = {typeOfStatisticalProcessing=0;typeOfTimeIncrement=255;}
     "avgd"    = {typeOfStatisticalProcessing=0;typeOfTimeIncrement=1;}
     "accum"   = {typeOfStatisticalProcessing=1;typeOfTimeIncrement=2;}
+    "accum"   = {typeOfStatisticalProcessing=1;typeOfTimeIncrement=255;}
     "max"     = {typeOfStatisticalProcessing=2;}
     "min"     = {typeOfStatisticalProcessing=3;}
     "diff"    = {typeOfStatisticalProcessing=4;} # end-start