diff --git a/src/vppinfra/linux/mem.c b/src/vppinfra/linux/mem.c
index 96fb0db..ef98b3f 100644
--- a/src/vppinfra/linux/mem.c
+++ b/src/vppinfra/linux/mem.c
@@ -579,6 +579,7 @@
   hdr->base_addr = (uword) base;
   hdr->log2_page_sz = log2_page_sz;
   hdr->num_pages = size >> log2_page_sz;
+  hdr->fd = fd;
   snprintf (hdr->name, CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1, "%s", (char *) name);
   hdr->name[CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1] = 0;
   mprotect (hdr, sys_page_sz, PROT_NONE);