diff --git a/Extension/package.json b/Extension/package.json
index ae898c8ee..8d81c1bf0 100644
--- a/Extension/package.json
+++ b/Extension/package.json
@@ -281,6 +281,20 @@
           "message": 5
         }
       },
+      {
+        "name": "iar",
+        "source": "iar",
+        "owner": "cpptools",
+        "fileLocation" : "absolute",
+        "pattern": {
+          "regexp": "^\"(.*?)\",(\\d+)\\s+(?:[Ff]atal\\s+)?([Ww]arning|[Ee]rror)\\[(\\w+\\d+)\\]:\\s+(.*)$",
+          "file": 1,
+          "line": 2,
+          "severity": 3,
+          "code": 4,
+          "message": 5
+        }
+      },
       {
         "name": "armcc5",
         "source": "armcc5",