diff --git a/man2/mprotect.2 b/man2/mprotect.2
index 317d6ad0c..384ac6d62 100644
--- a/man2/mprotect.2
+++ b/man2/mprotect.2
@@ -58,6 +58,8 @@ The memory can be written to.
 .TP
 .B PROT_EXEC
 The memory can contain executing code.
+.\" FIXME
+.\" Document MAP_GROWSUP and MAP_GROWSDOWN
 .PP
 The new protection replaces any existing protection.  For example, if the
 memory had previously been marked \fBPROT_READ\fR, and \fBmprotect\fR()