diff --git a/sys/conf/options.ia64 b/sys/conf/options.ia64
index 86e9cec33b3a..a753b0c4567b 100644
--- a/sys/conf/options.ia64
+++ b/sys/conf/options.ia64
@@ -6,6 +6,7 @@ ITANIUM2		opt_global.h
 
 IA32			opt_global.h
 
+LOG2_ID_PAGE_SIZE	opt_global.h
 LOG2_PAGE_SIZE		opt_global.h
 
 UWX_TRACE_ENABLE	opt_global.h