diff --git a/include/chipdrivers.h b/include/chipdrivers.h
index 56644a0..0b1f1f6 100644
--- a/include/chipdrivers.h
+++ b/include/chipdrivers.h
@@ -230,4 +230,7 @@
 int prepare_memory_register_access(struct flashctx *, enum preparation_steps);
 void finish_memory_access(struct flashctx *);
 
+/* flashprog.c */
+int probe_noop(struct flashctx *);
+
 #endif /* !__CHIPDRIVERS_H__ */