diff --git a/config/Config.in b/config/Config.in
index e9c3eff1e..14de5c8f2 100644
--- a/config/Config.in
+++ b/config/Config.in
@@ -31,6 +31,7 @@ menu "General Configuration"
 
 config PREFIX
     string "axTLS installation prefix"
+    depends on !CONFIG_PLATFORM_WIN32
     default "/usr/local"
     help
       Define your directory to install axTLS files/subdirs in.