diff --git a/src/Composer/Repository/ArtifactRepository.php b/src/Composer/Repository/ArtifactRepository.php
index 2383b2dd3..0184cb4d5 100644
--- a/src/Composer/Repository/ArtifactRepository.php
+++ b/src/Composer/Repository/ArtifactRepository.php
@@ -126,7 +126,9 @@ class ArtifactRepository extends ArrayRepository implements ConfigurableReposito
     private function getComposerInformation(\SplFileInfo $file)
     {
         $zip = new \ZipArchive();
-        $zip->open($file->getPathname());
+        if ($zip->open($file->getPathname()) !== true) {
+            return false;
+        }
 
         if (0 == $zip->numFiles) {
             $zip->close();
diff --git a/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip b/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip
new file mode 100644
index 000000000..562f032d4
Binary files /dev/null and b/tests/Composer/Test/Repository/Fixtures/artifacts/not-a-zip-with-zip-extension.zip differ