diff --git a/README b/README
index 37b91d0..b272a86 100644
--- a/README
+++ b/README
@@ -140,6 +140,7 @@
 Winbond W49F002U
 Winbond W49V002A
 Winbond W49V002FA
+Winbond W39V040FA
 Winbond W39V040A
 Winbond W39V040B
 Winbond W39V080A
diff --git a/flash.h b/flash.h
index 3e3ad84..6ced0f1 100644
--- a/flash.h
+++ b/flash.h
@@ -99,6 +99,7 @@
 #define WINBOND_ID		0xDA	/* Winbond */
 #define W_29C011		0xC1
 #define W_29C020C		0x45
+#define W_39V040FA		0x34
 #define W_39V040A		0x3D
 #define W_39V040B		0x54
 #define W_39V080A		0xD0
diff --git a/flashchips.c b/flashchips.c
index bf0a976..07fc56d 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -105,6 +105,8 @@
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
 	{"W49V002FA", 	WINBOND_ID, 	W_49V002FA,	NULL, 256, 128,
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
+	{"W39V040FA", 	WINBOND_ID, 	W_39V040FA,	NULL, 512, 64*1024,
+	 probe_jedec,	erase_chip_jedec, write_39sf020, NULL},
 	{"W39V040A", 	WINBOND_ID, 	W_39V040A,	NULL, 512, 64*1024,
 	 probe_jedec,	erase_chip_jedec, write_39sf020, NULL},
 	{"W39V040B",    WINBOND_ID,     W_39V040B,      NULL, 512, 64*1024,