diff --git a/specification/monitor/resource-manager/microsoft.insights/stable/2018-01-01/metrics_API.json b/specification/monitor/resource-manager/microsoft.insights/stable/2018-01-01/metrics_API.json
index 85f933cb038c..ae8bf47b7f85 100644
--- a/specification/monitor/resource-manager/microsoft.insights/stable/2018-01-01/metrics_API.json
+++ b/specification/monitor/resource-manager/microsoft.insights/stable/2018-01-01/metrics_API.json
@@ -54,7 +54,7 @@
             "$ref": "#/parameters/IntervalParameter"
           },
           {
-            "$ref": "#/parameters/MetricParameter"
+            "$ref": "#/parameters/MetricNamesParameter"
           },
           {
             "$ref": "#/parameters/AggregationsParameter"
@@ -316,12 +316,12 @@
       "description": "The interval (i.e. timegrain) of the query.",
       "x-ms-parameter-location": "method"
     },
-    "MetricParameter": {
-      "name": "metric",
+    "MetricNamesParameter": {
+      "name": "metricnames",
       "in": "query",
       "required": false,
       "type": "string",
-      "description": "The name of the metric to retrieve.",
+      "description": "The names of the metrics (comma separated) to retrieve.",
       "x-ms-parameter-location": "method"
     },
     "AggregationsParameter": {