diff --git a/src/Composer/Installer/BinaryInstaller.php b/src/Composer/Installer/BinaryInstaller.php
index 840e8745d..cdbd1074c 100644
--- a/src/Composer/Installer/BinaryInstaller.php
+++ b/src/Composer/Installer/BinaryInstaller.php
@@ -95,7 +95,7 @@ class BinaryInstaller
             } elseif ($this->binCompat === "symlink") {
                 $this->installSymlinkBinaries($binPath, $link);
             }
-            Silencer::call('chmod', $link, 0777 & ~umask());
+            Silencer::call('chmod', $binPath, 0777 & ~umask());
         }
     }
 
@@ -149,7 +149,6 @@ class BinaryInstaller
         // add unixy support for cygwin and similar environments
         if ('.bat' !== substr($binPath, -4)) {
             $this->installUnixyProxyBinaries($binPath, $link);
-            @chmod($link, 0777 & ~umask());
             $link .= '.bat';
             if (file_exists($link)) {
                 $this->io->writeError('    Skipped installation of bin '.$bin.'.bat proxy for package '.$package->getName().': a .bat proxy was already installed');
@@ -157,6 +156,7 @@ class BinaryInstaller
         }
         if (!file_exists($link)) {
             file_put_contents($link, $this->generateWindowsProxyCode($binPath, $link));
+            Silencer::call('chmod', $link, 0777 & ~umask());
         }
     }
 
@@ -170,6 +170,7 @@ class BinaryInstaller
     protected function installUnixyProxyBinaries($binPath, $link)
     {
         file_put_contents($link, $this->generateUnixyProxyCode($binPath, $link));
+        Silencer::call('chmod', $link, 0777 & ~umask());
     }
 
     protected function initializeBinDir()