diff --git a/lib/Froxlor/Api/Commands/Admins.php b/lib/Froxlor/Api/Commands/Admins.php
index 6c1a653b..426b1f82 100644
--- a/lib/Froxlor/Api/Commands/Admins.php
+++ b/lib/Froxlor/Api/Commands/Admins.php
@@ -713,6 +713,10 @@ class Admins extends \Froxlor\Api\ApiCommand implements \Froxlor\Api\ResourceEnt
 			if ($id == $this->getUserDetail('adminid')) {
 				\Froxlor\UI\Response::standard_error('youcantdeleteyourself', '', true);
 			}
+			// can't delete the first superadmin
+			if ($id == 1) {
+				\Froxlor\UI\Response::standard_error('cannotdeletesuperadmin', '', true);
+			}
 
 			// delete admin
 			$del_stmt = Database::prepare("
diff --git a/tests/Admins/AdminsTest.php b/tests/Admins/AdminsTest.php
index 635f3574..52d5b6a9 100644
--- a/tests/Admins/AdminsTest.php
+++ b/tests/Admins/AdminsTest.php
@@ -355,4 +355,16 @@ class AdminsTest extends TestCase
 			'loginname' => 'admin'
 		))->update();
 	}
+
+	public function testAdminsAdminsCannotDeleteFirstAdmin()
+	{
+		global $admin_userdata;
+		$testadmin_userdata = $admin_userdata;
+		$testadmin_userdata['adminid'] = 10;
+
+		$this->expectExceptionMessage("The first admin cannot be deleted.");
+		Admins::getLocal($testadmin_userdata, array(
+			'loginname' => 'admin'
+		))->delete();
+	}
 }