diff --git a/src/Http/Middleware/CheckClientCredentials.php b/src/Http/Middleware/CheckClientCredentials.php
index a24959dbe..b666c2c57 100644
--- a/src/Http/Middleware/CheckClientCredentials.php
+++ b/src/Http/Middleware/CheckClientCredentials.php
@@ -17,7 +17,7 @@ class CheckClientCredentials extends CheckCredentials
      */
     protected function validateCredentials($token)
     {
-        if (! $token || $token->client->firstParty()) {
+        if (! $token || ! $token->client || $token->client->firstParty()) {
             throw new AuthenticationException;
         }
     }
diff --git a/src/Http/Middleware/CheckClientCredentialsForAnyScope.php b/src/Http/Middleware/CheckClientCredentialsForAnyScope.php
index e1f7b23ff..8576183d7 100644
--- a/src/Http/Middleware/CheckClientCredentialsForAnyScope.php
+++ b/src/Http/Middleware/CheckClientCredentialsForAnyScope.php
@@ -17,7 +17,7 @@ class CheckClientCredentialsForAnyScope extends CheckCredentials
      */
     protected function validateCredentials($token)
     {
-        if (! $token || $token->client->firstParty()) {
+        if (! $token || ! $token->client || $token->client->firstParty()) {
             throw new AuthenticationException;
         }
     }