diff --git a/man2/ptrace.2 b/man2/ptrace.2
index a383134c1..e5a646180 100644
--- a/man2/ptrace.2
+++ b/man2/ptrace.2
@@ -805,13 +805,11 @@ and
 .I data
 are ignored.)
 
-Processes that are not dumpable (see the description of
-.BR PR_SET_DUMPABLE
-in
-.BR prctl (2))
-can  not  be  attached  via
-.BR ptrace (2)
-.BR PTRACE_ATTACH .
+Permission to perform a
+.BR PTRACE_ATTACH
+is governed by a ptrace access mode
+.B PTRACE_MODE_ATTACH_REALCREDS
+check; see below.
 .TP
 .BR PTRACE_SEIZE " (since Linux 3.4)"
 .\"