diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index e21aaf4f5cb6..ffab84db6907 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -236,7 +236,8 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
 				if (!new_page)
 					goto out;
 				pmd_val(*pm_dir) = __pa(new_page) |
-					_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE;
+					_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE |
+					_SEGMENT_ENTRY_CO;
 				address = (address + PMD_SIZE) & PMD_MASK;
 				continue;
 			}