diff --git a/sys/winnt/nhico.uu b/sys/winnt/nhico.uu
index 855b54b0b..ae06fb468 100644
--- a/sys/winnt/nhico.uu
+++ b/sys/winnt/nhico.uu
@@ -1,4 +1,4 @@
-begin 600 nethack.uu
+begin 600 nethack.ico
 M```!``$`*"@```$`"`"H"P``%@```"@````H````4`````$`"```````````
 M````````````````````````````P````/_`_P#`P/\`W-S<`/_`P`"`@```
 MH*"@`(````!86%@`@`"``/___P#`__\`P,```/__P`#`_\``P\/#`*C<_P#_