diff --git a/nanoid.3 b/nanoid.3
index 6abe9e9..4ad8d1e 100644
--- a/nanoid.3
+++ b/nanoid.3
@@ -12,8 +12,9 @@
 expands to the default Nano ID length of 21.
 
 .Fn nanoidgen
-fills the buffer with a Nano ID of the specified length up to 256 and returns
-the return value of
+fills the buffer with a Nano ID of the specified length up to
+.Dv GETENTROPY_MAX (256)
+and returns the return value of
 .Xr getentropy 3 .
 .Sh RETURN VALUES
 .Rv -std
diff --git a/openbsd/nanoid.3 b/openbsd/nanoid.3
index bbb3285..7865dad 100644
--- a/openbsd/nanoid.3
+++ b/openbsd/nanoid.3
@@ -12,8 +12,9 @@
 expands to the default Nano ID length of 21.
 
 .Fn nanoidgen
-fills the buffer with a Nano ID of the specified length up to 256 and returns
-the return value of
+fills the buffer with a Nano ID of the specified length up to
+.Dv GETENTROPY_MAX (256)
+and returns the return value of
 .Xr getentropy 2 .
 .Sh RETURN VALUES
 .Rv -std