diff --git a/doc/efun/to_bytes b/doc/efun/to_bytes
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+SYNOPSIS
+        bytes to_bytes(string unicode, string encoding)
+        bytes to_bytes(int* characters, string encoding)
+        bytes to_bytes(bytes bytesequence)
+        bytes to_bytes(int* bytes)
+
+DESCRIPTION
+        The first argument is converted to a byte sequence.
+
+        The first two variants convert a unicode string resp. a sequence
+        of unicode characters to a byte sequence that represents
+        the encoded string. The second argument denotes the name of
+        the encoding to use.
+
+        The third variant just returns the argument.
+
+        The fourth variant converts an array of bytes to a byte string.
+
+HISTORY
+        Introduced in LDMud 3.6.0.
+
+SEE ALSO
+        to_text(E), to_string(E), to_array(E)