diff --git a/source/smbd/process_model.c b/source/smbd/process_model.c
index e631975b376..704e6cc7a2f 100644
--- a/source/smbd/process_model.c
+++ b/source/smbd/process_model.c
@@ -81,6 +81,7 @@ _PUBLIC_ NTSTATUS register_process_model(const void *_ops)
 
 _PUBLIC_ NTSTATUS process_model_init(struct loadparm_context *lp_ctx)
 {
+	extern NTSTATUS process_model_thread_init(void);
 	extern NTSTATUS process_model_standard_init(void);
 	extern NTSTATUS process_model_prefork_init(void);
 	extern NTSTATUS process_model_single_init(void);