diff --git a/definitions/grib2/section.4.def b/definitions/grib2/section.4.def
index ca9349e73..512544da4 100644
--- a/definitions/grib2/section.4.def
+++ b/definitions/grib2/section.4.def
@@ -28,6 +28,7 @@ concept datasetForLocal(unknown) {
   "tigge"   = {productionStatusOfProcessedData=5;}
   "s2s"     = {productionStatusOfProcessedData=6;}
   "s2s"     = {productionStatusOfProcessedData=7;}
+  "cerise"  = {marsClass="ci";}
   "era6"    = {marsClass="e6";} # for ERA6 parameters with constituentType
   "hydro"   = {marsClass="ce";} # EFAS/GLOFAS
   "hydro"   = {marsClass="ul";} # ULYSSES
diff --git a/definitions/mars/grib.mmsf.fc.def b/definitions/mars/grib.mmsf.fc.def
index 9d47177d1..d213cee45 100644
--- a/definitions/mars/grib.mmsf.fc.def
+++ b/definitions/mars/grib.mmsf.fc.def
@@ -15,3 +15,5 @@ if (centre == 80 && subCentre == 98 && class is "c3") {
   constant cnmc_cmcc = 'cmcc';
   alias mars.origin = cnmc_cmcc;
 }
+
+if (class is "ci") { unalias mars.method; }
diff --git a/definitions/mars/grib.msmm.fcmean.def b/definitions/mars/grib.msmm.fcmean.def
index 2330d5ace..800a49134 100644
--- a/definitions/mars/grib.msmm.fcmean.def
+++ b/definitions/mars/grib.msmm.fcmean.def
@@ -16,3 +16,5 @@ if (centre == 80 && subCentre == 98 && class is "c3") {
   constant cnmc_cmcc = 'cmcc';
   alias mars.origin = cnmc_cmcc;
 }
+
+if (class is "ci") { unalias mars.method; }