diff --git a/.gitignore b/.gitignore
index db39399..645bf6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 /build/bochscontinue
 /build/bochsrc
+/build/checkerboard_1024x768.png
+/build/checkerboard_800x600.xbm
 /build/check_makefile
 /build/check_makefile_targets
 /build/check_makefile_w_arnings
diff --git a/Makefile b/Makefile
index a0f0dd2..5b178a7 100644
--- a/Makefile
+++ b/Makefile
@@ -48,6 +48,8 @@ built_files = ${os_filename} \
               build/check_makefile \
               build/check_makefile_targets \
               build/check_makefile_w_arnings \
+              build/checkerboard_800x600.xbm \
+              build/checkerboard_1024x768.png \
               build/makefile_built_directories \
               build/makefile_built_files \
               build/makefile_database \