diff --git a/man3/setbuf.3 b/man3/setbuf.3
index df5aa42ae..a80ce3773 100644
--- a/man3/setbuf.3
+++ b/man3/setbuf.3
@@ -175,9 +175,9 @@ On 4.2BSD and 4.3BSD systems,
 .BR setbuf ()
 always uses a suboptimal buffer size and should be avoided.
 .P
-You must make sure that both
+You must make sure that the space that
 .I buf
-and the space it points to still exist by the time
+points to still exists by the time
 .I stream
 is closed, which also happens at program termination.
 .P