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?