diff --git a/src/Adapter/GD.php b/src/Adapter/GD.php
index 72f3c572d..21870fce8 100644
--- a/src/Adapter/GD.php
+++ b/src/Adapter/GD.php
@@ -978,6 +978,11 @@ public function page_text()
         // N/A
     }
 
+    public function page_line()
+    {
+        // N/A
+    }
+
     /**
      * Streams the image to the client.
      *