diff --git a/attn/meson.build b/attn/meson.build
index f6fdd56..3b085af 100644
--- a/attn/meson.build
+++ b/attn/meson.build
@@ -40,6 +40,7 @@
 
 # for custom/raw PEL creation
 pel_src = files(
+    'pel/extended_user_header.cpp',
     'pel/pel_minimal.cpp',
     'pel/private_header.cpp',
     'pel/primary_src.cpp',