diff --git a/src/Symfony/Component/Process/ExecutableFinder.php b/src/Symfony/Component/Process/ExecutableFinder.php
index d042a5b13a..1ec6526d45 100644
--- a/src/Symfony/Component/Process/ExecutableFinder.php
+++ b/src/Symfony/Component/Process/ExecutableFinder.php
@@ -77,7 +77,7 @@ class ExecutableFinder
         }
         foreach ($suffixes as $suffix) {
             foreach ($dirs as $dir) {
-                if (@is_file($file = $dir.DIRECTORY_SEPARATOR.$name.$suffix) && ('\\' === DIRECTORY_SEPARATOR || is_executable($file))) {
+                if (@is_file($file = $dir.DIRECTORY_SEPARATOR.$name.$suffix) && ('\\' === DIRECTORY_SEPARATOR || @is_executable($file))) {
                     return $file;
                 }
             }
diff --git a/src/Symfony/Component/Process/PhpExecutableFinder.php b/src/Symfony/Component/Process/PhpExecutableFinder.php
index f5c97d6bb9..3e38157247 100644
--- a/src/Symfony/Component/Process/PhpExecutableFinder.php
+++ b/src/Symfony/Component/Process/PhpExecutableFinder.php
@@ -49,7 +49,7 @@ class PhpExecutableFinder
         }
 
         if ($php = getenv('PHP_PATH')) {
-            if (!is_executable($php)) {
+            if (!@is_executable($php)) {
                 return false;
             }
 
@@ -57,12 +57,12 @@ class PhpExecutableFinder
         }
 
         if ($php = getenv('PHP_PEAR_PHP_BIN')) {
-            if (is_executable($php)) {
+            if (@is_executable($php)) {
                 return $php;
             }
         }
 
-        if (is_executable($php = PHP_BINDIR.('\\' === DIRECTORY_SEPARATOR ? '\\php.exe' : '/php'))) {
+        if (@is_executable($php = PHP_BINDIR.('\\' === DIRECTORY_SEPARATOR ? '\\php.exe' : '/php'))) {
             return $php;
         }