diff --git a/w39v040c.c b/w39v040c.c
index 853419a..20e53fa 100644
--- a/w39v040c.c
+++ b/w39v040c.c
@@ -19,6 +19,7 @@
  */
 
 #include "flash.h"
+#include "chipdrivers.h"
 
 int probe_w39v040c(struct flashchip *flash)
 {