diff --git a/docs/C_SOURCE_FILES b/docs/C_SOURCE_FILES
index 7fa7d0a67..d87fa7b75 100644
--- a/docs/C_SOURCE_FILES
+++ b/docs/C_SOURCE_FILES
@@ -262,6 +262,8 @@ p2v/about-authors.c
 p2v/about-license.c
 p2v/config.c
 p2v/conversion.c
+p2v/gui-gtk2-compat.h
+p2v/gui-gtk3-compat.h
 p2v/gui.c
 p2v/inhibit.c
 p2v/kernel-cmdline.c