diff --git a/Library/Homebrew/utils/analytics.rb b/Library/Homebrew/utils/analytics.rb
index 2e59b8f009..9766c14db3 100644
--- a/Library/Homebrew/utils/analytics.rb
+++ b/Library/Homebrew/utils/analytics.rb
@@ -4,7 +4,8 @@ module Utils
   module Analytics
     class << self
       def clear_anonymous_os_prefix_ci_cache
-        remove_instance_variable(:@anonymous_os_prefix_ci) if instance_variable_defined?(:@anonymous_os_prefix_ci)
+        return unless instance_variable_defined?(:@anonymous_os_prefix_ci)
+        remove_instance_variable(:@anonymous_os_prefix_ci)
       end
 
       def os_prefix_ci