diff --git a/net-nds/openldap/openldap-2.4.57-r2.ebuild b/net-nds/openldap/openldap-2.4.57-r2.ebuild
index 5ec8d89d34fe3..92d0abe3c671a 100644
--- a/net-nds/openldap/openldap-2.4.57-r2.ebuild
+++ b/net-nds/openldap/openldap-2.4.57-r2.ebuild
@@ -321,7 +321,7 @@ openldap_upgrade_howto() {
 	i="${l}.raw"
 	eerror " 1. /etc/init.d/slapd stop"
 	eerror " 2. slapcat -l ${i}"
-	eerror " 3. egrep -v '^(entry|context)CSN:' <${i} >${l}"
+	eerror " 3. grep -E -v '^(entry|context)CSN:' <${i} >${l}"
 	eerror " 4. mv /var/lib/openldap-data/ /var/lib/openldap-data-backup/"
 	eerror " 5. emerge --update \=net-nds/${PF}"
 	eerror " 6. etc-update, and ensure that you apply the changes"
diff --git a/net-nds/openldap/openldap-2.4.58-r2.ebuild b/net-nds/openldap/openldap-2.4.58-r2.ebuild
index dda39f5339c00..41c31f8ea9733 100644
--- a/net-nds/openldap/openldap-2.4.58-r2.ebuild
+++ b/net-nds/openldap/openldap-2.4.58-r2.ebuild
@@ -321,7 +321,7 @@ openldap_upgrade_howto() {
 	i="${l}.raw"
 	eerror " 1. /etc/init.d/slapd stop"
 	eerror " 2. slapcat -l ${i}"
-	eerror " 3. egrep -v '^(entry|context)CSN:' <${i} >${l}"
+	eerror " 3. grep -E -v '^(entry|context)CSN:' <${i} >${l}"
 	eerror " 4. mv /var/lib/openldap-data/ /var/lib/openldap-data-backup/"
 	eerror " 5. emerge --update \=net-nds/${PF}"
 	eerror " 6. etc-update, and ensure that you apply the changes"
diff --git a/net-nds/openldap/openldap-2.4.59-r2.ebuild b/net-nds/openldap/openldap-2.4.59-r2.ebuild
index 0aca184d68498..f04abefec1a41 100644
--- a/net-nds/openldap/openldap-2.4.59-r2.ebuild
+++ b/net-nds/openldap/openldap-2.4.59-r2.ebuild
@@ -321,7 +321,7 @@ openldap_upgrade_howto() {
 	i="${l}.raw"
 	eerror " 1. /etc/init.d/slapd stop"
 	eerror " 2. slapcat -l ${i}"
-	eerror " 3. egrep -v '^(entry|context)CSN:' <${i} >${l}"
+	eerror " 3. grep -E -v '^(entry|context)CSN:' <${i} >${l}"
 	eerror " 4. mv /var/lib/openldap-data/ /var/lib/openldap-data-backup/"
 	eerror " 5. emerge --update \=net-nds/${PF}"
 	eerror " 6. etc-update, and ensure that you apply the changes"
diff --git a/net-nds/openldap/openldap-2.5.4-r1.ebuild b/net-nds/openldap/openldap-2.5.4-r1.ebuild
index 8304dd4e70f12..4582bc9b50677 100644
--- a/net-nds/openldap/openldap-2.5.4-r1.ebuild
+++ b/net-nds/openldap/openldap-2.5.4-r1.ebuild
@@ -272,7 +272,7 @@ openldap_upgrade_howto() {
 	i="${l}.raw"
 	eerror " 1. /etc/init.d/slapd stop"
 	eerror " 2. slapcat -l ${i}"
-	eerror " 3. egrep -v '^(entry|context)CSN:' <${i} >${l}"
+	eerror " 3. grep -E -v '^(entry|context)CSN:' <${i} >${l}"
 	eerror " 4. mv /var/lib/openldap-data/ /var/lib/openldap-data-backup/"
 	eerror " 5. emerge --update \=net-nds/${PF}"
 	eerror " 6. etc-update, and ensure that you apply the changes"
diff --git a/net-nds/openldap/openldap-2.6.1-r1.ebuild b/net-nds/openldap/openldap-2.6.1-r1.ebuild
index 1223fd163d99b..698e662ce9cce 100644
--- a/net-nds/openldap/openldap-2.6.1-r1.ebuild
+++ b/net-nds/openldap/openldap-2.6.1-r1.ebuild
@@ -281,7 +281,7 @@ openldap_upgrade_howto() {
 	i="${l}.raw"
 	eerror " 1. /etc/init.d/slapd stop"
 	eerror " 2. slapcat -l ${i}"
-	eerror " 3. egrep -v '^(entry|context)CSN:' <${i} >${l}"
+	eerror " 3. grep -E -v '^(entry|context)CSN:' <${i} >${l}"
 	eerror " 4. mv /var/lib/openldap-data/ /var/lib/openldap-data-backup/"
 	eerror " 5. emerge --update \=net-nds/${PF}"
 	eerror " 6. etc-update, and ensure that you apply the changes"