diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 363ba7082ef59efab5e90d94184cbf593aeff7ea..5e39858880f30a892a7a3a637768965c4759081c 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -95,6 +95,8 @@ unsigned long vm_dirty_bytes;
  */
 unsigned int dirty_writeback_interval = 5 * 100; /* centiseconds */
 
+EXPORT_SYMBOL_GPL(dirty_writeback_interval);
+
 /*
  * The longest time for which data is allowed to remain dirty
  */