diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/CompiledUrlMatcherDumper.php b/src/Symfony/Component/Routing/Matcher/Dumper/CompiledUrlMatcherDumper.php
index 51cb046b33..ab67e6885a 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/CompiledUrlMatcherDumper.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/CompiledUrlMatcherDumper.php
@@ -91,7 +91,7 @@ EOF;
 
         while (true) {
             try {
-                $this->signalingException = new \RuntimeException('preg_match(): Compilation failed: regular expression is too large');
+                $this->signalingException = new \RuntimeException('Compilation failed: regular expression is too large');
                 $compiledRoutes = array_merge($compiledRoutes, $this->compileDynamicRoutes($dynamicRoutes, $matchHost, $chunkLimit, $conditions));
 
                 break;
@@ -349,7 +349,7 @@ EOF;
             $state->markTail = 0;
 
             // if the regex is too large, throw a signaling exception to recompute with smaller chunk size
-            set_error_handler(function ($type, $message) { throw 0 === strpos($message, $this->signalingException->getMessage()) ? $this->signalingException : new \ErrorException($message); });
+            set_error_handler(function ($type, $message) { throw false !== strpos($message, $this->signalingException->getMessage()) ? $this->signalingException : new \ErrorException($message); });
             try {
                 preg_match($state->regex, '');
             } finally {
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php b/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php
index 50f974f2e8..65b6c0718b 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php
@@ -197,6 +197,6 @@ class StaticPrefixCollection
 
     public static function handleError($type, $msg)
     {
-        return 0 === strpos($msg, 'preg_match(): Compilation failed: lookbehind assertion is not fixed length');
+        return false !== strpos($msg, 'Compilation failed: lookbehind assertion is not fixed length');
     }
 }