diff --git a/src/helpers.php b/src/helpers.php
index 80103780b3..5b21de4cf9 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -5,11 +5,22 @@
 use Roots\Sage\Template\WrapperCollection;
 use Roots\Sage\Template\WrapperInterface;
 
+/**
+ * @param WrapperInterface $wrapper
+ * @param string $slug
+ * @return string
+ * @throws \Exception
+ * @SuppressWarnings(PHPMD.StaticAccess) This is a helper function, so we can suppress this warning
+ */
 function template_wrap(WrapperInterface $wrapper, $slug = 'base') {
     WrapperCollection::add($wrapper, $slug);
     return $wrapper->getWrapper();
 }
 
+/**
+ * @param string $slug
+ * @return string
+ */
 function template_unwrap($slug = 'base') {
     return WrapperCollection::get($slug)->getTemplate();
 }
diff --git a/src/lib/Sage/Template/WrapperCollection.php b/src/lib/Sage/Template/WrapperCollection.php
index c1a46e28d6..06437d3d99 100644
--- a/src/lib/Sage/Template/WrapperCollection.php
+++ b/src/lib/Sage/Template/WrapperCollection.php
@@ -30,14 +30,13 @@ public static function instance()
     /**
      * @param WrapperInterface $wrapper
      * @param string $slug
-     * @param bool $overwriteIfExists
      * @return $this
      * @throws \Exception
      */
-    public static function add(WrapperInterface $wrapper, $slug = '', $overwriteIfExists = false)
+    public static function add(WrapperInterface $wrapper, $slug = '')
     {
         $slug = $slug ?: $wrapper->getSlug();
-        if (self::instance()->exists($slug) && !$overwriteIfExists) {
+        if (self::instance()->exists($slug)) {
             throw new \Exception("Wrapper $slug already exists.");
         }
         self::instance()->wrappers[$slug] = $wrapper;