diff --git a/INSTALL.md b/INSTALL.md
index b95b5d1..762eab4 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -87,7 +87,7 @@ $ sudo apt install mingw-w64 nsis
 #### Build
 
 ```
-$ set MYCMS_PREFIX=/tmp/mycms-prefix
+$ MYCMS_PREFIX=/tmp/mycms-prefix
 ```
 
 #### OpenSSL Build