diff --git a/ruby_ast.qll b/ruby_ast.qll
index 0a11d636068..6961412bf08 100644
--- a/ruby_ast.qll
+++ b/ruby_ast.qll
@@ -18,7 +18,7 @@ class Top extends @top {
 
   Location getLocation() { none() }
 
-  Top getAFieldOrChild(int i) { none() }
+  Top getAFieldOrChild() { none() }
 }
 
 class UnderscoreArg extends @underscore_arg, Top, ArgumentListChildType, ArrayChildType,