diff --git a/ql/src/codeql_ruby/ast/Parameter.qll b/ql/src/codeql_ruby/ast/Parameter.qll
index a2c5417f29d..a9c3587c523 100644
--- a/ql/src/codeql_ruby/ast/Parameter.qll
+++ b/ql/src/codeql_ruby/ast/Parameter.qll
@@ -63,7 +63,7 @@ class NamedParameter extends Parameter {
 
 /** A simple (normal) parameter. */
 class SimpleParameter extends NamedParameter, PatternParameter, VariablePattern {
-  final override string getName() { result = this.(VariablePattern::Range).getVariableName() }
+  final override string getName() { result = range.getVariableName() }
 
   final override Variable getVariable() { result = TLocalVariable(_, _, this) }