Mention that an empty password is the same as no password.
diff --git a/man/zip_fopen_encrypted.mdoc b/man/zip_fopen_encrypted.mdoc
index 58319e1..f40cc7c 100644
--- a/man/zip_fopen_encrypted.mdoc
+++ b/man/zip_fopen_encrypted.mdoc
@@ -29,7 +29,7 @@
.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd September 14, 2020
+.Dd September 15, 2020
.Dt ZIP_FOPEN_ENCRYPTED 3
.Os
.Sh NAME
@@ -54,6 +54,12 @@
using the password given in the
.Ar password
argument.
+If
+.Ar password
+is
+.Dv NULL
+or the empty string, the default password is used (see
+.Xr zip_set_default_password 3 ) .
The
.Ar flags
argument are the same as for
diff --git a/man/zip_set_default_password.mdoc b/man/zip_set_default_password.mdoc
index 79fb0ca..855c632 100644
--- a/man/zip_set_default_password.mdoc
+++ b/man/zip_set_default_password.mdoc
@@ -29,7 +29,7 @@
.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd September 14, 2020
+.Dd September 15, 2020
.Dt ZIP_SET_DEFAULT_PASSWORD 3
.Os
.Sh NAME
@@ -48,8 +48,8 @@
If
.Ar password
is
-.Dv NULL ,
-the default password is unset.
+.Dv NULL
+or the empty string, the default password is unset.
.Pp
If you prefer a different password for single files, use
.Xr zip_fopen_encrypted 3
