diff --git a/doc/plustek/Plustek-USB.changes b/doc/plustek/Plustek-USB.changes
index 5056c5c3a..cdfeca778 100644
--- a/doc/plustek/Plustek-USB.changes
+++ b/doc/plustek/Plustek-USB.changes
@@ -3,6 +3,19 @@ Plustek.changes - Gerhard J
 
 Note: All other not mentioned builds have never been released.
 
+V 0.50-1 (2005-08-15)
+---------------------
+Cleanup
+Activated IPC between reader-process and parent
+Added button support for Plustek/Genius devices
+Did some whitespace cleanup and removed those *p typedefs
+Tried to improve CIS calibration (somewhat back to 1.0.13)
+Added _TWEAK_GAIN definition to allow CIS calibration increase
+gain values during basic lamp setup phase
+Added call to speedtest to CIS calibration
+Fixed CanoScan startup problem (the way misc I/Os will be set
+after power-up has done the trick)
+
 V 0.49-8 (2005-08-08)
 ---------------------
 Added LiDE25 settings