diff --git a/meson.build b/meson.build
index 05aa623..44eff6f 100644
--- a/meson.build
+++ b/meson.build
@@ -12,6 +12,7 @@
 
 conf_data = configuration_data()
 conf_data.set('RMCP_PING', get_option('rmcp_ping').enabled())
+conf_data.set('PAM_AUTHENTICATE', get_option('pam_authenticate').enabled())
 
 configure_file(output: 'config.h',
     configuration: conf_data