1 files changed, 1 insertions, 1 deletions

diff --git a/coreutils/sum.c b/coreutils/sum.c
index a75dd321d..65478b0a1 100644
--- a/coreutils/sum.c
+++ b/coreutils/sum.c
@@ -74,7 +74,7 @@ static unsigned sum_file(const char *file, const unsigned type)
 #undef buf
 }
 
-int sum_main(int argc, char **argv);
+int sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int sum_main(int argc, char **argv)
 {
         unsigned n;