diff --git a/maint.mk b/maint.mk
index fa2fe742..1eb52179 100644
--- a/maint.mk
+++ b/maint.mk
@@ -696,7 +696,7 @@ sc_require_test_exit_idiom:
 	      exit 1; } || :;						\
 	fi
 
-exclude_file_name_regexp--sc_trailing_blank = \.ico$$|\.bmp$$|\.odt$$
+exclude_file_name_regexp--sc_trailing_blank = \.ico$$|\.bmp$$|\.odt$$|\.png$$
 
 sc_trailing_blank:
 	@prohibit='[	 ]$$'						\