1 files changed, 1 insertions, 1 deletions

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 1281c609ee98..98246acd4991 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -593,7 +593,7 @@ mem_init (void)
         platform_dma_init();
 #endif
 
-#ifndef CONFIG_DISCONTIGMEM
+#ifdef CONFIG_FLATMEM
         if (!mem_map)
                 BUG();
         max_mapnr = max_low_pfn;