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-rw-r--r--doc/crypto/BN_add.pod1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/crypto/BN_add.pod b/doc/crypto/BN_add.pod
index 942048c10d..3ad227458d 100644
--- a/doc/crypto/BN_add.pod
+++ b/doc/crypto/BN_add.pod
@@ -49,6 +49,7 @@ BN_add() adds I<a> and I<b> and places the result in I<r> (C<r=a+b>).
I<r> may be the same B<BIGNUM> as I<a> or I<b>.
BN_sub() subtracts I<b> from I<a> and places the result in I<r> (C<r=a-b>).
+I<r> may be the same B<BIGNUM> as I<a> or I<b>.
BN_mul() multiplies I<a> and I<b> and places the result in I<r> (C<r=a*b>).
I<r> may be the same B<BIGNUM> as I<a> or I<b>.