diff --git a/opm/parser/share/keywords/000_Eclipse100/M/MULTIREG b/opm/parser/share/keywords/000_Eclipse100/M/MULTIREG
new file mode 100644
index 000000000..fcbe06f0b
--- /dev/null
+++ b/opm/parser/share/keywords/000_Eclipse100/M/MULTIREG
@@ -0,0 +1,6 @@
+{"name" : "MULTIREG" , "sections" : ["GRID","EDIT","PROP","REGIONS","SOLUTION"], 
+ "items" :
+ [{"name" : "ARRAY" , "value_type" : "STRING" , "description" : "The 3D array we will update"},
+  {"name" : "FACTOR" , "value_type" : "DOUBLE" , "description" : "The value we will multiply with" , "default" : 0} ,
+  {"name" : "REGION_NUMBER" , "value_type" : "INT"    , "description" : "The region number we are interested in"} ,
+  {"name" : "REGION_NAME"   , "value_type" : "STRING" , "description" : "The name of the region we are interested in" , "default" : "M"}]}