diff --git a/src/throwable.php b/src/throwable.php
index fe19a23..08bf1d6 100644
--- a/src/throwable.php
+++ b/src/throwable.php
@@ -2,5 +2,23 @@
 // @codingStandardsIgnoreFile
 // phpcs:ignore
 if (!interface_exists('Throwable')) {
-    interface Throwable {}
+    interface Throwable
+    {
+        /** @return string */
+        public function getMessage();
+        /** @return int */
+        public function getCode();
+        /** @return string */
+        public function getFile();
+        /** @return int */
+        public function getLine();
+        /** @return array */
+        public function getTrace();
+        /** @return string */
+        public function getTraceAsString();
+        /** @return null|Throwable */
+        public function getPrevious();
+        /** @return string */
+        public function __toString();
+    }
 }