diff --git a/README b/README
index f8dc76f..260bf15 100644
--- a/README
+++ b/README
@@ -23,7 +23,7 @@
   Supported Printers:
 
    Canon SELPHY ES series
-   Canon SELPHY CP series (except CP520, CP820, and CP910)
+   Canon SELPHY CP series (except CP820, and CP910)
    Kodak Professional 1400
    Kodak 605 Photo Printer
    Kodak 805 Photo Printer
@@ -148,7 +148,8 @@
       the P_XXX enumeration defined in backend_common.h. The '7' in this
       example corresponds to most Canon SELPHY CP models, and is what you
       would use if you were trying to get the backend to detect an
-      otherwise unrecognized SELPHY CP model (eg the CP520).
+      otherwise unrecognized SELPHY CP model.
+
       If you are able to successfuly print using this technique, please let
       us know so we can add the apppriate entry to the internal database.
 
@@ -165,11 +166,7 @@
 
    Unverified/untested, but should work:  (let us know, please!)
 
-     ES20, CP-220, CP530, CP600, CP810
-
-   NOT currently supported:  (USB PIDs unknown) 
-	
-     CP520
+     ES20, CP-220, CP520, CP530, CP600, CP810
 
    NOT supported:  (Printer does not need a backend)
 
diff --git a/backend_canonselphy.c b/backend_canonselphy.c
index cd9b8c5..e4a22ba 100644
--- a/backend_canonselphy.c
+++ b/backend_canonselphy.c
@@ -48,7 +48,7 @@
 #define USB_PID_CANON_CP400 0x30F6
 #define USB_PID_CANON_CP500 0x30F5
 #define USB_PID_CANON_CP510 0x3128
-#define USB_PID_CANON_CP520 520 // XXX 316f? 3172? (related to cp740/cp750)
+#define USB_PID_CANON_CP520 0x3172
 #define USB_PID_CANON_CP530 0x31b1
 #define USB_PID_CANON_CP600 0x310B
 #define USB_PID_CANON_CP710 0x3127
@@ -924,7 +924,7 @@ top:
 
 struct dyesub_backend canonselphy_backend = {
 	.name = "Canon SELPHY CP/ES",
-	.version = "0.84",
+	.version = "0.85",
 	.uri_prefix = "canonselphy",
 	.init = canonselphy_init,
 	.attach = canonselphy_attach,
diff --git a/blacklist b/blacklist
index fc98357..204a8bc 100644
--- a/blacklist
+++ b/blacklist
@@ -34,7 +34,7 @@
 0x04a9 0x3128 blacklist
 
 # Canon SELPHY CP520
-# ??? UNKNOWN
+0x04a9 0x3172 blacklist
 
 # Canon SELPHY CP530
 0x04a9 0x31b1 blacklist