diff --git a/mpirxx.h b/mpirxx.h
index f69cb48c..2b0cb9a6 100644
--- a/mpirxx.h
+++ b/mpirxx.h
@@ -3326,6 +3326,8 @@ __GMP_DEFINE_UNARY_FUNCTION(floor, __gmp_floor_function)
 __GMP_DEFINE_UNARY_FUNCTION(ceil, __gmp_ceil_function)
 __GMP_DEFINE_UNARY_FUNCTION(sqrt, __gmp_sqrt_function)
 __GMP_DEFINE_BINARY_FUNCTION(hypot, __gmp_hypot_function)
+__GMP_DEFINE_BINARY_FUNCTION(gcd, __gmp_gcd_function)
+__GMP_DEFINE_BINARY_FUNCTION(lcm, __gmp_lcm_function)
 
 __GMP_DEFINE_UNARY_TYPE_FUNCTION(int, sgn, __gmp_sgn_function)
 __GMP_DEFINE_BINARY_TYPE_FUNCTION(int, cmp, __gmp_cmp_function)