diff --git a/CHANGELOG.md b/CHANGELOG.md
index 83c8a0f..6ff1fcb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Added
 - Support Laravel 8 [\#1022 / barryvdh](https://github.com/barryvdh/laravel-ide-helper/pull/1022)
 - Add option to force usage of FQN [\#1031 / edvordo](https://github.com/barryvdh/laravel-ide-helper/pull/1031)
+- Add support for macros of all macroable classes [\#1006 / domkrm](https://github.com/barryvdh/laravel-ide-helper/pull/1006)
 
 2020-08-11, 2.8.0
 -----------------
diff --git a/README.md b/README.md
index 7142569..5cb9e45 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,18 @@ You can use an in-memory SQLite driver by adding the `-M` option.
 You can choose to include helper files. This is not enabled by default, but you can override it with the `--helpers (-H)` option.
 The `Illuminate/Support/helpers.php` is already set up, but you can add/remove your own files in the config file.
 
+### Automatic PHPDoc generation for macros and mixins
+
+This package can generate PHPDocs for macros and mixins which will be added to the `_ide_helper.php` file.
+
+But this only works if you use type hinting when declaring a macro.
+
+```php
+Str::macro('concat', function(string $str1, string $str2) : string {
+    return $str1 . $str2;
+});
+```
+
 ### Automatic PHPDocs for models
 
 If you don't want to write your properties yourself, you can use the command `php artisan ide-helper:models` to generate
diff --git a/src/Generator.php b/src/Generator.php
index d1b4517..877e915 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -13,6 +13,9 @@ namespace Barryvdh\LaravelIdeHelper;
 
 use Illuminate\Foundation\AliasLoader;
 use Illuminate\Support\Collection;
+use Illuminate\Support\Str;
+use Illuminate\Support\Traits\Macroable;
+use ReflectionClass;
 use Symfony\Component\Console\Output\OutputInterface;
 
 class Generator
@@ -220,7 +223,11 @@ class Generator
      */
     protected function getAliasesByExtendsNamespace()
     {
-        return $this->getValidAliases()->groupBy(function (Alias $alias) {
+        $aliases = $this->getValidAliases();
+
+        $this->addMacroableClasses($aliases);
+
+        return $aliases->groupBy(function (Alias $alias) {
             return $alias->getExtendsNamespace();
         });
     }
@@ -291,4 +298,55 @@ class Generator
             echo $string . "\r\n";
         }
     }
+
+    /**
+     * Add all macroable classes which are not already loaded as an alias and have defined macros.
+     *
+     * @param Collection $aliases
+     */
+    protected function addMacroableClasses(Collection $aliases)
+    {
+        $macroable = $this->getMacroableClasses($aliases);
+
+        foreach ($macroable as $class) {
+            $reflection = new ReflectionClass($class);
+
+            if (!$reflection->getStaticProperties()['macros']) {
+                continue;
+            }
+
+            $aliases[] = new Alias($this->config, $class, $class, [], $this->interfaces);
+        }
+    }
+
+    /**
+     * Get all loaded macroable classes which are not loaded as an alias.
+     *
+     * @param Collection $aliases
+     * @return Collection
+     */
+    protected function getMacroableClasses(Collection $aliases)
+    {
+        return (new Collection(get_declared_classes()))
+            ->filter(function ($class) {
+                $reflection = new ReflectionClass($class);
+
+                // Filter out internal classes and class aliases
+                return !$reflection->isInternal() && $reflection->getName() === $class;
+            })
+            ->filter(function ($class) {
+                $traits = class_uses($class);
+
+                // Filter only classes with the macroable trait
+                return isset($traits[Macroable::class]);
+            })
+            ->filter(function ($class) use ($aliases) {
+                $class = Str::start($class, '\\');
+
+                // Filter out aliases
+                return !$aliases->first(function (Alias $alias) use ($class) {
+                    return $alias->getExtends() === $class;
+                });
+            });
+    }
 }
diff --git a/src/Macro.php b/src/Macro.php
index 2dd9e20..55132fe 100644
--- a/src/Macro.php
+++ b/src/Macro.php
@@ -3,6 +3,7 @@
 namespace Barryvdh\LaravelIdeHelper;
 
 use Barryvdh\Reflection\DocBlock;
+use Barryvdh\Reflection\DocBlock\Tag;
 
 class Macro extends Method
 {
@@ -30,7 +31,26 @@ class Macro extends Method
      */
     protected function initPhpDoc($method)
     {
-        $this->phpdoc = new DocBlock($method);
+        $this->phpdoc = new DocBlock('/** */');
+
+        // Add macro parameters
+        foreach ($method->getParameters() as $parameter) {
+            $type = $parameter->hasType() ? $parameter->getType()->getName() : 'mixed';
+            $type .= $parameter->hasType() && $parameter->getType()->allowsNull() ? '|null' : '';
+
+            $name = $parameter->isVariadic() ? '...' : '';
+            $name .= '$' . $parameter->getName();
+
+            $this->phpdoc->appendTag(Tag::createInstance("@param {$type} {$name}"));
+        }
+
+        // Add macro return type
+        if ($method->hasReturnType()) {
+            $type = $method->getReturnType()->getName();
+            $type .= $method->getReturnType()->allowsNull() ? '|null' : '';
+
+            $this->phpdoc->appendTag(Tag::createInstance("@return {$type}"));
+        }
     }
 
     /**