diff --git a/src/Indexer.php b/src/Indexer.php
index d6b9ae44..713f9145 100644
--- a/src/Indexer.php
+++ b/src/Indexer.php
@@ -18,6 +18,7 @@ class Indexer
     private const TYPE_CLASS     = 1;
     private const TYPE_METHOD    = 2;
     private const TYPE_NAMESPACE = 3;
+    private const TYPE_FUNCTION  = 4;
 
     public function getIndex(Project $project)
     {
@@ -43,6 +44,11 @@ public function getIndex(Project $project)
             }
         }
 
+        foreach ($project->getProjectFunctions() as $function) {
+            $index['searchIndex'][] = $this->getSearchString((string) $function);
+            $index['info'][]        = [self::TYPE_FUNCTION, $function];
+        }
+
         return $index;
     }
 
diff --git a/src/Renderer/Renderer.php b/src/Renderer/Renderer.php
index 237de01d..be2b6007 100644
--- a/src/Renderer/Renderer.php
+++ b/src/Renderer/Renderer.php
@@ -120,6 +120,7 @@ protected function renderGlobalTemplates(Project $project, $callback = null)
             'namespaces' => $project->getNamespaces(),
             'interfaces' => $project->getProjectInterfaces(),
             'classes' => $project->getProjectClasses(),
+            'functions' => $project->getProjectFunctions(),
             'items' => $this->getIndex($project),
             'index' => $this->indexer->getIndex($project),
             'tree' => $this->getTree($project),
diff --git a/src/Renderer/TwigExtension.php b/src/Renderer/TwigExtension.php
index 1c6a2756..f575ff37 100644
--- a/src/Renderer/TwigExtension.php
+++ b/src/Renderer/TwigExtension.php
@@ -76,9 +76,10 @@ public function setCurrentDepth(int $depth): void
         $this->currentDepth = $depth;
     }
 
-    public function pathForFunction(array $context, string $function): string
+    public function pathForFunction(array $context, FunctionReflection $function): string
     {
-        return $this->relativeUri($this->currentDepth) . '#function_' . str_replace('\\', '', $function);
+        $namespace = $this->pathForNamespace($context, $function->getNamespace());
+        return $this->relativeUri($this->currentDepth) . $namespace . '#function_' . str_replace('\\', '', $function->getName());
     }
 
     public function pathForClass(array $context, string $class): string
diff --git a/src/Resources/themes/default/doctum.js.twig b/src/Resources/themes/default/doctum.js.twig
index 94360cd4..148f805a 100644
--- a/src/Resources/themes/default/doctum.js.twig
+++ b/src/Resources/themes/default/doctum.js.twig
@@ -90,6 +90,16 @@
             -}},
             {{ add_class_methods_index(class, prettyJsonOptions) }}
         {% endfor %}
+        {% for function in functions -%}
+            {{-
+                {
+                    type: 'Function'|trans,
+                    link: function_path(function),
+                    name: function.__toString(),
+                    doc: function.shortdesc|desc(function)|md_to_html,
+                }|json_encode(prettyJsonOptions)|raw
+            -}},
+        {% endfor %}
         {# Override this block, search_index_extra, to add custom search entries! #}
         {% block search_index_extra '' %}
         // Fix trailing commas in the index