diff --git a/lib/database_cleaner/active_record/truncation.rb b/lib/database_cleaner/active_record/truncation.rb
index 76ec0fe..58345db 100755
--- a/lib/database_cleaner/active_record/truncation.rb
+++ b/lib/database_cleaner/active_record/truncation.rb
@@ -29,7 +29,15 @@ module ActiveRecord
       end
     end
 
-    MYSQL_ADAPTER_PARENT = USE_ARJDBC_WORKAROUND ? JdbcAdapter : AbstractAdapter
+    # ActiveRecord 3.1 support
+    if defined?(AbstractMysqlAdapter)
+      MYSQL_ADAPTER_PARENT = USE_ARJDBC_WORKAROUND ? JdbcAdapter : AbstractMysqlAdapter
+      MYSQL2_ADAPTER_PARENT = AbstractMysqlAdapter
+    else
+      MYSQL_ADAPTER_PARENT = USE_ARJDBC_WORKAROUND ? JdbcAdapter : AbstractAdapter
+      MYSQL2_ADAPTER_PARENT = AbstractAdapter
+    end
+    
     SQLITE_ADAPTER_PARENT = USE_ARJDBC_WORKAROUND ? JdbcAdapter : SQLiteAdapter
     POSTGRE_ADAPTER_PARENT = USE_ARJDBC_WORKAROUND ? JdbcAdapter : AbstractAdapter
 
@@ -39,7 +47,7 @@ module ActiveRecord
       end
     end
 
-    class Mysql2Adapter < AbstractAdapter
+    class Mysql2Adapter < MYSQL2_ADAPTER_PARENT
       def truncate_table(table_name)
         execute("TRUNCATE TABLE #{quote_table_name(table_name)};")
       end