diff --git a/Inpsyde/Helpers.php b/Inpsyde/Helpers.php
index 472da6e..de07329 100644
--- a/Inpsyde/Helpers.php
+++ b/Inpsyde/Helpers.php
@@ -217,6 +217,57 @@ public static function isHookClosure(
         return in_array(($tokens[$functionCall]['content'] ?? ''), $actions, true);
     }
 
+    /**
+     * @param File $file
+     * @param int $functionPosition
+     * @return bool
+     */
+    public static function isHookFunction(File $file, int $functionPosition): bool
+    {
+        $tokens = $file->getTokens();
+        if (($tokens[$functionPosition]['code'] ?? '') !== T_FUNCTION) {
+            return false;
+        }
+
+        $findDocEnd = $file->findPrevious(
+            [T_WHITESPACE, T_FINAL, T_PUBLIC, T_ABSTRACT],
+            $functionPosition - 1,
+            null,
+            true,
+            null,
+            true
+        );
+
+        if (!$findDocEnd || ($tokens[$findDocEnd]['code'] ?? '') !== T_DOC_COMMENT_CLOSE_TAG) {
+            return false;
+        }
+
+        $findDocStart = $file->findPrevious(
+            [T_DOC_COMMENT_OPEN_TAG],
+            $findDocEnd,
+            null,
+            false,
+            null,
+            true
+        );
+
+        if (!$findDocStart
+            || ($tokens[$findDocStart]['comment_closer'] ?? '') !== $findDocEnd
+        ) {
+            return false;
+        }
+        
+        $docTokens = self::filterTokensByType($findDocStart, $findDocEnd, $file, T_DOC_COMMENT_TAG);
+
+        foreach ($docTokens as $token) {
+            if ($token['content'] === '@wp-hook') {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * @param File $file
      * @param int $functionPosition
diff --git a/Inpsyde/Sniffs/CodeQuality/ArgumentTypeDeclarationSniff.php b/Inpsyde/Sniffs/CodeQuality/ArgumentTypeDeclarationSniff.php
index beb8931..5a971c2 100644
--- a/Inpsyde/Sniffs/CodeQuality/ArgumentTypeDeclarationSniff.php
+++ b/Inpsyde/Sniffs/CodeQuality/ArgumentTypeDeclarationSniff.php
@@ -41,6 +41,10 @@ public function register()
      */
     public function process(File $file, $position)
     {
+        if (Helpers::isHookClosure($file, $position) || Helpers::isHookFunction($file, $position)) {
+            return;
+        }
+
         $tokens = $file->getTokens();
 
         $paramsStart = $tokens[$position]['parenthesis_opener'] ?? 0;
@@ -61,11 +65,7 @@ public function process(File $file, $position)
             );
 
             $type = $tokens[$typePosition] ?? null;
-            if ($type && in_array($type['code'], self::TYPE_CODES, true)) {
-                continue;
-            }
-
-            if (!Helpers::isHookClosure($file, $position)) {
+            if ($type && !in_array($type['code'], self::TYPE_CODES, true)) {
                 $file->addWarning('Argument type is missing', $position, 'NoArgumentType');
             }
         }