diff --git a/games/arithmetic/arithmetic.c b/games/arithmetic/arithmetic.c
index 8c329dea7b2d..06bc49e3bad9 100644
--- a/games/arithmetic/arithmetic.c
+++ b/games/arithmetic/arithmetic.c
@@ -95,7 +95,7 @@ time_t qtime;
  * bound is 10.  After every NQUESTS questions, statistics on the performance
  * so far are printed.
  */
-void
+int
 main(argc, argv)
 	int argc;
 	char **argv;