1 files changed, 1 insertions, 1 deletions
diff --git a/src/factor.c b/src/factor.c
index 0706dff69..3b5e82586 100644
--- a/src/factor.c
+++ b/src/factor.c
@@ -167,7 +167,7 @@ do_stdin (void)
   return fail;
 }
 
-void
+int
 main (int argc, char **argv)
 {
   int fail;