diff --git a/config-post.h b/config-post.h
index dd4ef8fc0b..54731feff7 100644
--- a/config-post.h
+++ b/config-post.h
@@ -69,7 +69,6 @@
 # undef WITH_VIRTUALPORT
 # undef WITH_SECDRIVER_SELINUX
 # undef WITH_SECDRIVER_APPARMOR
-# undef WITH_CAPNG
 #endif /* LIBVIRT_NSS */
 
 #ifndef __GNUC__