diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index 2e5d71aacca80..c856ae8e10536 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -36,7 +36,7 @@ class AbstractAdapter
       include Savepoints
 
       SIMPLE_INT = /\A\d+\z/
-      COMMENT_REGEX = %r{(?:--.*\n)*|/\*(?:[^*]|\*[^/])*\*/}m
+      COMMENT_REGEX = %r{(?:--.*\n)|/\*(?:[^*]|\*[^/])*\*/}m
 
       attr_accessor :pool
       attr_reader :visitor, :owner, :logger, :lock