diff --git a/development/Win32/packaging/AltInstaller/Updated.nsh b/development/Win32/packaging/AltInstaller/Updated.nsh
index a55c3fce16..d439fc32d1 100644
--- a/development/Win32/packaging/AltInstaller/Updated.nsh
+++ b/development/Win32/packaging/AltInstaller/Updated.nsh
@@ -53,6 +53,7 @@ Function UpdateModifiedFiles
  File "${PRODUCT_SOURCEDIR}\Resources\layouts\slides.layout"
  SetOutPath "$INSTDIR\Resources\lyx2lyx" # always here
  File "${PRODUCT_SOURCEDIR}\Resources\lyx2lyx\lyx2lyx_version.py" # always here
+ File "${PRODUCT_SOURCEDIR}\Resources\lyx2lyx\lyx_1_5.py"
  SetOutPath "$INSTDIR\Resources\man\man1"
  File "${PRODUCT_SOURCEDIR}\Resources\man\man1\lyxclient.1"
  SetOutPath "$INSTDIR\Resources\ui"