diff --git a/lib/libc/stdio/fopen.3 b/lib/libc/stdio/fopen.3
index cbd633e2f139..f639f858d5bf 100644
--- a/lib/libc/stdio/fopen.3
+++ b/lib/libc/stdio/fopen.3
@@ -230,15 +230,20 @@ argument,
 .Fn fmemopen
 allocates
 .Fa size
-bytes of memory. This buffer is automatically freed when the
-stream is closed. Buffers can be opened in text-mode (default) or binary-mode
+bytes of memory.
+This buffer is automatically freed when the stream is closed.
+Buffers can be opened in text-mode (default) or binary-mode
 (if
 .Dq Li b
 is present in the second or third position of the
 .Fa mode
-argument). Buffers opened in text-mode make sure that writes are terminated with
-a NULL byte, if the last write hasn't filled up the whole buffer. Buffers
-opened in binary-mode never append a NULL byte.
+argument).
+Buffers opened in text-mode make sure that writes are terminated with a
+.Dv NULL
+byte, if the last write hasn't filled up the whole buffer.
+Buffers opened in binary-mode never append a
+.Dv NULL
+byte.
 .Sh RETURN VALUES
 Upon successful completion
 .Fn fopen ,