diff --git a/src/Patches.php b/src/Patches.php
index 4f77eb3b..52e4203a 100644
--- a/src/Patches.php
+++ b/src/Patches.php
@@ -564,6 +564,19 @@ protected function applyPatchWithGit($install_path, $patch_levels, $filename) {
     return $patched;
   }
 
+  /**
+   * Indicates if a package has been patched.
+   *
+   * @param \Composer\Package\PackageInterface $package
+   *   The package to check.
+   *
+   * @return bool
+   *   TRUE if the package has been patched.
+   */
+  public static function isPackagePatched(PackageInterface $package) {
+    return array_key_exists('patches_applied', $package->getExtra());
+  }
+
     /**
      * {@inheritDoc}
      */