diff --git a/include/linux/libata.h b/include/linux/libata.h
index e7090df..e5ad52a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -40,7 +40,6 @@
  */
 #undef ATA_VERBOSE_DEBUG	/* yet more debugging output */
 #undef ATA_IRQ_TRAP		/* define to ack screaming irqs */
-#undef ATA_NDEBUG		/* define to disable quick runtime checks */
 
 
 /* note: prints function name for you */