diff --git a/.appveyor.yml b/.appveyor.yml
index 74e0c8d28..507fdb244 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,6 +1,6 @@
 environment:
   CYG_MIRROR: http://cygwin.mirror.constant.com
-  CYG_PACKAGES: make,gcc-core
+  CYG_PACKAGES: make,gcc-core,libiconv-devel
   DOCUMENT_FOLDER: /share/doc/hashcat
   matrix:
     - CYG_ROOT: C:\cygwin64