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-rw-r--r--doc/crypto/EVP_PKEY_CTX_ctrl.pod2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/crypto/EVP_PKEY_CTX_ctrl.pod b/doc/crypto/EVP_PKEY_CTX_ctrl.pod
index 6deccfbf95..37e2b72323 100644
--- a/doc/crypto/EVP_PKEY_CTX_ctrl.pod
+++ b/doc/crypto/EVP_PKEY_CTX_ctrl.pod
@@ -37,7 +37,7 @@ EVP_PKEY_ctrl, EVP_PKEY_ctrl_str - algorithm specific control operations
=head1 DESCRIPTION
The function EVP_PKEY_CTX_ctrl() sends a control operation to the context
-B<ctx>. The key type used must match B<keytype> if it is not zero. The parameter
+B<ctx>. The key type used must match B<keytype> if it is not -1. The parameter
B<optype> is a mask indicating which operations the control can be applied to.
The control command is indicated in B<cmd> and any additional arguments in
B<p1> and B<p2>.