diff --git a/src/Composer/Installer/SuggestedPackagesReporter.php b/src/Composer/Installer/SuggestedPackagesReporter.php
index 4d8de6086..56fe4599f 100644
--- a/src/Composer/Installer/SuggestedPackagesReporter.php
+++ b/src/Composer/Installer/SuggestedPackagesReporter.php
@@ -99,8 +99,8 @@ class SuggestedPackagesReporter
      * Do not list the ones already installed if installed repository provided.
      *
      * @param  int                       $mode             One of the MODE_* constants from this class
-     * @param  InstalledRepository       $installedRepo    If passed in, suggested packages which are installed already will be skipped
-     * @param  PackageInterface          $onlyDependentsOf If passed in, only the suggestions from direct dependents of that package, or from the package itself, will be shown
+     * @param  InstalledRepository|null  $installedRepo    If passed in, suggested packages which are installed already will be skipped
+     * @param  PackageInterface|null     $onlyDependentsOf If passed in, only the suggestions from direct dependents of that package, or from the package itself, will be shown
      * @return SuggestedPackagesReporter
      */
     public function output($mode, InstalledRepository $installedRepo = null, PackageInterface $onlyDependentsOf = null)
@@ -167,8 +167,8 @@ class SuggestedPackagesReporter
     /**
      * Output number of new suggested packages and a hint to use suggest command.
      *
-     * @param  InstalledRepository       $installedRepo    If passed in, suggested packages which are installed already will be skipped
-     * @param  PackageInterface          $onlyDependentsOf If passed in, only the suggestions from direct dependents of that package, or from the package itself, will be shown
+     * @param  InstalledRepository|null  $installedRepo    If passed in, suggested packages which are installed already will be skipped
+     * @param  PackageInterface|null     $onlyDependentsOf If passed in, only the suggestions from direct dependents of that package, or from the package itself, will be shown
      * @return SuggestedPackagesReporter
      */
     public function outputMinimalistic(InstalledRepository $installedRepo = null, PackageInterface $onlyDependentsOf = null)
@@ -182,8 +182,8 @@ class SuggestedPackagesReporter
     }
 
     /**
-     * @param  InstalledRepository       $installedRepo    If passed in, suggested packages which are installed already will be skipped
-     * @param  PackageInterface          $onlyDependentsOf If passed in, only the suggestions from direct dependents of that package, or from the package itself, will be shown
+     * @param  InstalledRepository|null  $installedRepo    If passed in, suggested packages which are installed already will be skipped
+     * @param  PackageInterface|null     $onlyDependentsOf If passed in, only the suggestions from direct dependents of that package, or from the package itself, will be shown
      * @return array[]
      */
     private function getFilteredSuggestions(InstalledRepository $installedRepo = null, PackageInterface $onlyDependentsOf = null)