diff --git a/src/vppinfra/CMakeLists.txt b/src/vppinfra/CMakeLists.txt
index 728072c..c682d70 100644
--- a/src/vppinfra/CMakeLists.txt
+++ b/src/vppinfra/CMakeLists.txt
@@ -204,6 +204,7 @@
     elf_clib.c
     linux/mem.c
     linux/sysfs.c
+    linux/netns.c
    )
 endif()