doc/gmp.texi (mpz_invert): Specify mod 0 is not handled.

1 files changed, 3 insertions, 2 deletions

diff --git a/doc/gmp.texi b/doc/gmp.texi
index bbe0900d8..6e4b6e475 100644
--- a/doc/gmp.texi
+++ b/doc/gmp.texi
@@ -3585,8 +3585,9 @@ Set @var{rop} to the least common multiple of @var{op1} and @var{op2}.
 @cindex Inverse modulo functions
 Compute the inverse of @var{op1} modulo @var{op2} and put the result in
 @var{rop}.  If the inverse exists, the return value is non-zero and @var{rop}
-will satisfy @math{0 < @var{rop} < @var{@GMPabs{op2}}}.  If an inverse doesn't exist
-the return value is zero and @var{rop} is undefined.
+will satisfy @math{0 < @var{rop} < @var{@GMPabs{op2}}}.  If an inverse doesn't
+exist the return value is zero and @var{rop} is undefined.  The behaviour of
+this function is undefined when @var{op2} is zero.
 @end deftypefun
 
 @deftypefun int mpz_jacobi (mpz_t @var{a}, mpz_t @var{b})