diff --git a/unsupported/plustek-opticbook-3600.html b/unsupported/plustek-opticbook-3600.html
index 03721adc..93cc7ded 100644
--- a/unsupported/plustek-opticbook-3600.html
+++ b/unsupported/plustek-opticbook-3600.html
@@ -31,7 +31,7 @@
     </p>
     <h2>Chipset</h2>
     <p>
-      GL842
+      GL842 (very similar to GL841)
     </p>
     <h2>Comments</h2>
     <p>
@@ -53,7 +53,7 @@ E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E:  Ad=83(I) Atr=03(Int.) MxPS=   1 Ivl=16ms
 
-&lt;device descriptor of 0x07b3/0x0900 at 005:011 (PLUSTEK INC USB2.0 SCANNER)&gt;
+&lt;device descriptor of 0x07b3/0x0900 at 005:021 (PLUSTEK INC USB2.0 SCANNER)&gt;
 bLength               18
 bDescriptorType       1
 bcdUSB                2.00
@@ -115,12 +115,14 @@ bNumConfigurations    1
     bInterval         8 ms
     bRefresh          0
     bSynchAddress     0
- 
+
 &lt;trying to find out which USB chip is used&gt;
     checking for GT-6801 ...
     this is not a GT-6801 (bcdUSB = 0x200)
     checking for GT-6816 ...
     this is not a GT-6816 (bDeviceClass = 255, bInterfaceClass = 255)
+    checking for GT-8911 ...
+    this is not a GT-8911 (check 1, bDeviceClass = 255, bInterfaceClass = 255)
     checking for MA-1017 ...
     this is not a MA-1017 (bDeviceClass = 255, bInterfaceClass = 255)
     checking for MA-1015 ...
@@ -131,12 +133,14 @@ bNumConfigurations    1
     this is not a LM983x (bcdUSB = 0x200)
     checking for GL646 ...
     this is not a GL646 (bDeviceClass = 255, bInterfaceClass = 255)
+    checking for GL646_HP ...
+    this is not a GL646_HP (bcdUSB = 0x200)
     checking for GL660+GL646 ...
     this is not a GL660+GL646 (bDeviceClass = 255, bInterfaceClass = 255)
-&lt;Couldn't determine the type of the USB chip&gt;
- 
-found USB scanner (vendor=0x07b3 [PLUSTEK INC], product=0x0900 [USB2.0 SCANNER]) at libusb:005:011
+    checking for GL841 ...
+&lt;This USB chip looks like a GL841&gt;
 
+found USB scanner (vendor=0x07b3 [PLUSTEK INC], product=0x0900 [USB2.0 SCANNER], chip=GL841) at libusb:005:021
     </pre>
     
     <h1>Want to add or correct information?</h1>