diff --git a/src/vlib/unix/main.c b/src/vlib/unix/main.c
index 7e868f9..786addf 100644
--- a/src/vlib/unix/main.c
+++ b/src/vlib/unix/main.c
@@ -61,6 +61,7 @@
 
 unix_main_t unix_main;
 clib_file_main_t file_main;
+vlib_physmem_main_t physmem_main;
 
 static clib_error_t *
 unix_main_init (vlib_main_t * vm)