diff --git a/man2/vfork.2 b/man2/vfork.2
index 9558a640e..139c79b8c 100644
--- a/man2/vfork.2
+++ b/man2/vfork.2
@@ -180,6 +180,17 @@ LinuxThreads threading library.
 (See
 .BR pthreads (7)
 for a description of Linux threading libraries.)
+
+A call to
+.BR vfork ()
+is equivalent to calling
+.BR clone (2)
+with
+.I flags
+specified as:
+
+     CLONE_VM | CLONE_VFORK | SIGCHLD
+
 .SS History
 The
 .BR vfork ()