Missing welcome image in NSIS/MUI2

I'm struggling to add an image to the first page of an installer written with NSIS/MUI2.

Here's a trimmed down version of the code I'm using.

!include "MUI2.nsh"

!define MUI_HEADERIMAGE
    !define MUI_HEADERIMAGE_BITMAP nsis-header.bmp

!define MUI_WELCOMEFINISHPAGE_BITMAP nsis-welcome.bmp

OutFile "Setup.exe"

# Set language
!insertmacro MUI_LANGUAGE "English"

# Pages for installation
!insertmacro MUI_PAGE_WELCOME
!insertmacro MUI_PAGE_LICENSE "..\LICENSE"
!insertmacro MUI_PAGE_FINISH

Section Foo
SectionEnd

The header is shown correctly on the license page, but I can't get it to show on the welcome page. I tried with a 164x314 image (as the doc recommends), with bitmaps saved in 16b or 24b or 32b, with the same image as the header (to make sure it wasn't a problem with the bitmap), compiling the setup under Win2k and Linux... Nothing works.

The bitmap is correctly stored in the setup:

$ 7z l demyo-1.4.exe  | grep modern- | awk '{ print $4 }'
$PLUGINSDIR/modern-header.bmp
$PLUGINSDIR/modern-wizard.bmp

Any idea of what I'm doing wrong?

Solution

MUI_LANGUAGE macro(s) have to come after the MUI_PAGE_* macros in the source file