diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
index ab3bd70aa600..3d5e588eec6a 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
@@ -3664,12 +3664,8 @@
           }
         },
         "arguments": {
-          "description": "User specified arguments to HDInsightActivity.",
-          "type": "array",
-          "items": {
-            "type": "object",
-            "description": "Type: string (or Expression with resultType string)."
-          }
+          "type": "object",
+          "description": "User specified arguments to HDInsightActivity. Type: array (or Expression with resultType array)."
         },
         "getDebugInfo": {
           "$ref": "#/definitions/HDInsightActivityDebugInfoOption",