diff --git a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
index 99a9cf23e839..9c05daa36fe9 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
@@ -172,7 +172,7 @@ private function sanitizeLogs($logs)
                 continue;
             }
 
-            $message = $log['message'];
+            $message = '_'.$log['message'];
             $exception = $log['context']['exception'];
 
             if ($exception instanceof SilencedErrorContext) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
index 8b7fbe2a19ea..b46357ed5585 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
@@ -132,13 +132,15 @@ public function getCollectTestData()
             [
                 ['message' => 'foo3', 'context' => ['exception' => new \ErrorException('warning', 0, E_USER_WARNING)], 'priority' => 100, 'priorityName' => 'DEBUG'],
                 ['message' => 'foo3', 'context' => ['exception' => new SilencedErrorContext(E_USER_WARNING, __FILE__, __LINE__)], 'priority' => 100, 'priorityName' => 'DEBUG'],
+                ['message' => '0', 'context' => ['exception' => new SilencedErrorContext(E_USER_WARNING, __FILE__, __LINE__)], 'priority' => 100, 'priorityName' => 'DEBUG'],
             ],
             [
                 ['message' => 'foo3', 'context' => ['exception' => ['warning', E_USER_WARNING]], 'priority' => 100, 'priorityName' => 'DEBUG'],
                 ['message' => 'foo3', 'context' => ['exception' => [E_USER_WARNING]], 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => true],
+                ['message' => '0', 'context' => ['exception' => [E_USER_WARNING]], 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => true],
             ],
             0,
-            1,
+            2,
         ];
     }
 }