diff --git a/man2/select.2 b/man2/select.2
index 44ed6eddf..cc787824f 100644
--- a/man2/select.2
+++ b/man2/select.2
@@ -139,7 +139,9 @@ The indicated file descriptors in each set are checked, up to this limit
 .PP
 The
 .I timeout
-argument specifies the interval that
+argument is a 
+.I timeval
+structure (shown below) that specifies the interval that
 .BR select ()
 should block waiting for a file descriptor to become ready.
 The call will block until either: