diff --git a/framework/core/migrations/2015_02_24_000000_create_access_tokens_table.php b/framework/core/migrations/2015_02_24_000000_create_access_tokens_table.php
index dd904a93b..a6073fce8 100644
--- a/framework/core/migrations/2015_02_24_000000_create_access_tokens_table.php
+++ b/framework/core/migrations/2015_02_24_000000_create_access_tokens_table.php
@@ -14,7 +14,7 @@ class CreateAccessTokensTable extends Migration {
 	{
 		Schema::create('access_tokens', function(Blueprint $table)
 		{
-			$table->string('id', 100);
+			$table->string('id', 100)->primary();
 			$table->integer('user_id')->unsigned();
 		});
 	}