diff --git a/src/Assert.php b/src/Assert.php
index cbf8ed8..7058112 100644
--- a/src/Assert.php
+++ b/src/Assert.php
@@ -266,7 +266,8 @@ public static function resource($value, $type = null, $message = '')
         if (!\is_resource($value)) {
             static::reportInvalidArgument(\sprintf(
                 $message ?: 'Expected a resource. Got: %s',
-                static::typeToString($value)
+                static::typeToString($value),
+                $type // User supplied message might include the second placeholder.
             ));
         }
 
diff --git a/tests/AssertTest.php b/tests/AssertTest.php
index f094d79..b95eba1 100644
--- a/tests/AssertTest.php
+++ b/tests/AssertTest.php
@@ -820,6 +820,14 @@ public function testIsAOfExceptionMessages(array $args, string $exceptionMessage
 
         call_user_func_array(array('Webmozart\Assert\Assert', 'isAOf'), $args);
     }
+
+    public function testResourceOfTypeCustomMessage(): void
+    {
+        $this->expectException('\InvalidArgumentException');
+        $this->expectExceptionMessage('I want a resource of type curl. Got: NULL');
+
+        Assert::resource(null, 'curl', 'I want a resource of type %2$s. Got: %s');
+    }
 }
 
 /**