diff --git a/doc/CREDITS b/doc/CREDITS
index a43ea6371..41f1103af 100644
--- a/doc/CREDITS
+++ b/doc/CREDITS
@@ -8,6 +8,7 @@ for the 6502 out there. He built the grounds for this cc65 and some other cc65
 implementations and a lot of his code is still in the current compiler.
 
 
+
 More special thanks to:
 
   * Keith W. Gerdes <kwg@freebird.ghofn.org>
@@ -37,6 +38,13 @@ More special thanks to:
 
     Maciej is responsible for the GEOS support.
 
+  * MicroSystems Development Technologies Inc. located in San Jose,
+    California payed me for the addition of several assembler features,
+    which went also into the freeware version. These guys are selling
+    nice hardware devices like EPROM emulators. If you are developing
+    hardware or embedded microcontroller applications, you should have
+    a look at their web site at www.msd.com.
+
 
 
 Thanks to