diff --git a/docs/editor/tasks.md b/docs/editor/tasks.md
index 6f98565fc..43128d456 100644
--- a/docs/editor/tasks.md
+++ b/docs/editor/tasks.md
@@ -639,6 +639,8 @@ A matcher that captures the above warning (and errors) looks like this:
     "owner": "cpp",
     // The file name for reported problems is relative to the opened folder.
     "fileLocation": ["relative", "${workspaceFolder}"],
+    // The name that will be shown as the source of the problem.
+    "source": "gcc",
     // The actual pattern to match problems in the output.
     "pattern": {
         // The regular expression. Example to match: helloWorld.c:5:3: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]
@@ -672,6 +674,7 @@ Here is a finished `tasks.json` file with the code above (comments removed) wrap
             "problemMatcher": {
                 "owner": "cpp",
                 "fileLocation": ["relative", "${workspaceFolder}"],
+                "source": "gcc",
                 "pattern": {
                     "regexp": "^(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
                     "file": 1,