diff --git a/development/Win32/packaging/installer/lyx_installer.nsi b/development/Win32/packaging/installer/lyx_installer.nsi
index 7e641d6b5b..bd581add0a 100644
--- a/development/Win32/packaging/installer/lyx_installer.nsi
+++ b/development/Win32/packaging/installer/lyx_installer.nsi
@@ -20,7 +20,7 @@
 CRCCheck force
 
 ; Make the installer as small as possible.
-;SetCompressor lzma
+SetCompressor lzma
 
 ;--------------------------------
 ; You should need to change only these macros...