diff --git a/net-fs/samba/samba-4.2.4-r1.ebuild b/net-fs/samba/samba-4.2.4-r1.ebuild
index edc4797ee5b68..2d125c0cb3c9a 100644
--- a/net-fs/samba/samba-4.2.4-r1.ebuild
+++ b/net-fs/samba/samba-4.2.4-r1.ebuild
@@ -68,7 +68,7 @@ RDEPEND="${CDEPEND}
 	selinux? ( sec-policy/selinux-samba )
 "
 
-REQUIRED_USE="addc? ( gnutls )
+REQUIRED_USE="addc? ( gnutls !system-mitkrb5 )
 	ads? ( acl gnutls ldap )
 	${PYTHON_REQUIRED_USE}"
 
diff --git a/net-fs/samba/samba-4.3.0.ebuild b/net-fs/samba/samba-4.3.0.ebuild
index f13f8b24b24c4..91f03be59985d 100644
--- a/net-fs/samba/samba-4.3.0.ebuild
+++ b/net-fs/samba/samba-4.3.0.ebuild
@@ -67,7 +67,7 @@ RDEPEND="${CDEPEND}
 	selinux? ( sec-policy/selinux-samba )
 "
 
-REQUIRED_USE="addc? ( gnutls )
+REQUIRED_USE="addc? ( gnutls !system-mitkrb5 )
 	ads? ( acl gnutls ldap )
 	${PYTHON_REQUIRED_USE}"