1 files changed, 1 insertions, 0 deletions
diff --git a/arith.h b/arith.h
index e57c368e..4d4d0fd5 100644
--- a/arith.h
+++ b/arith.h
@@ -25,6 +25,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+extern val mod_s, bit_s;
 val make_bignum(void);
 val bignum(cnum cn);
 val bignum_from_long(long l);