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-rw-r--r--doc/man3/X509_dup.pod2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/man3/X509_dup.pod b/doc/man3/X509_dup.pod
index 849364e2aae7..c8dd79ff71b7 100644
--- a/doc/man3/X509_dup.pod
+++ b/doc/man3/X509_dup.pod
@@ -367,7 +367,7 @@ followed by I<X509_check_purpose(copied_cert, -1, 0)>,
which re-builds the cached data.
B<I<TYPE>_free>() releases the object and all pointers and sub-objects
-within it.
+within it. If the argument is NULL, nothing is done.
B<I<TYPE>_print_ctx>() prints the object I<a> on the specified BIO I<out>.
Each line will be prefixed with I<indent> spaces.