diff --git a/man3/a64l.3 b/man3/a64l.3
index 762ec79c0..f4bd5361e 100644
--- a/man3/a64l.3
+++ b/man3/a64l.3
@@ -60,7 +60,7 @@ a-z	represent 38-63
 .RE
 So 123 = 59*64^0 + 1*64^1 = "v/".
 .SH ATTRIBUTES
-.SS Multithreading(see pthreads(7))
+.SS Multithreading (see pthreads(7))
 The
 .BR l64a ()
 function is not thread-safe.