diff --git a/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c b/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c
index e2285eac6c4..8306cfcc107 100644
--- a/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c
+++ b/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c
@@ -185,7 +185,7 @@ segment_create(map_segment_t *ds_buf,
     addr = mmap((void *)mca_sshmem_base_start_address,
                 size,
                 PROT_READ | PROT_WRITE,
-                MAP_SHARED |
+                MAP_PRIVATE |
 #if defined(MAP_ANONYMOUS)
                 MAP_ANONYMOUS |
 #endif