diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index 366cf77953b55bc737fcded0179df083138b3dbf..58f3ba709adecfb5da07e0b28a399218503763a6 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -142,7 +142,9 @@
 #endif
 
 #ifndef map_bankwidth
+#ifdef CONFIG_MTD
 #warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work"
+#endif
 static inline int map_bankwidth(void *map)
 {
 	BUG();