diff --git a/lib/rubocop/cop/performance/fixed_size.rb b/lib/rubocop/cop/performance/fixed_size.rb
index 01959f2130..0eff8fcb48 100644
--- a/lib/rubocop/cop/performance/fixed_size.rb
+++ b/lib/rubocop/cop/performance/fixed_size.rb
@@ -78,13 +78,13 @@ def allowed_parent?(node)
         end
 
         def contains_splat?(node)
-          return unless node.array_type?
+          return false unless node.array_type?
 
           node.each_child_node(:splat).any?
         end
 
         def contains_double_splat?(node)
-          return unless node.hash_type?
+          return false unless node.hash_type?
 
           node.each_child_node(:kwsplat).any?
         end