diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index 287fafc7c0349c4f1793ebd0b69665f18377a062..66284e8d4894e6f8ee2fede172b110728ed45d8c 100644
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -759,8 +759,6 @@ AC_DEFUN([LC_CONFIG_GSS_KEYRING],
  fi
 ])
 
-m4_pattern_allow(AC_KERBEROS_V5)
-
 #
 # LC_CONFIG_GSS (default disabled)
 #