diff --git a/etc/unbound/unbound.conf.d/dot-adguard.conf b/etc/unbound/unbound.conf.d/dot-adguard.conf
index ea9d1429..b2bd5023 100644
--- a/etc/unbound/unbound.conf.d/dot-adguard.conf
+++ b/etc/unbound/unbound.conf.d/dot-adguard.conf
@@ -8,9 +8,6 @@ server:
 	# Quad9 says pointless performance impact on forwarders.
 	# https://docs.quad9.net/Quad9_For_Organizations/DNS_Forwarder_Best_Practices/#disable-qname-minimization
 	qname-minimisation: no
-	# Private ECS is more accurate with IPv4 than IPv6.
-	prefer-ip4: yes
-	prefer-ip6: no
 
 forward-zone:
 	name: "."
diff --git a/etc/unbound/unbound.conf.d/dot-dns0-quad9.conf b/etc/unbound/unbound.conf.d/dot-dns0-quad9.conf
index d0a9ce3a..d02afd02 100644
--- a/etc/unbound/unbound.conf.d/dot-dns0-quad9.conf
+++ b/etc/unbound/unbound.conf.d/dot-dns0-quad9.conf
@@ -17,9 +17,6 @@ server:
 	# Quad9 says pointless performance impact on forwarders.
 	# https://docs.quad9.net/Quad9_For_Organizations/DNS_Forwarder_Best_Practices/#disable-qname-minimization
 	qname-minimisation: no
-	# Private ECS is more accurate with IPv4 than IPv6.
-	prefer-ip4: yes
-	prefer-ip6: no
 
 forward-zone:
 	name: "."
diff --git a/etc/unbound/unbound.conf.d/dot-dns0.conf b/etc/unbound/unbound.conf.d/dot-dns0.conf
index aa9ba567..a84a949e 100644
--- a/etc/unbound/unbound.conf.d/dot-dns0.conf
+++ b/etc/unbound/unbound.conf.d/dot-dns0.conf
@@ -8,9 +8,6 @@ server:
 	# Quad9 says pointless performance impact on forwarders.
 	# https://docs.quad9.net/Quad9_For_Organizations/DNS_Forwarder_Best_Practices/#disable-qname-minimization
 	qname-minimisation: no
-	# Private ECS is more accurate with IPv4 than IPv6.
-	prefer-ip4: yes
-	prefer-ip6: no
 
 forward-zone:
 	name: "."
diff --git a/etc/unbound/unbound.conf.d/dot-private-ecs.conf b/etc/unbound/unbound.conf.d/dot-private-ecs.conf
index bc654a1f..6d64c87a 100644
--- a/etc/unbound/unbound.conf.d/dot-private-ecs.conf
+++ b/etc/unbound/unbound.conf.d/dot-private-ecs.conf
@@ -8,9 +8,6 @@ server:
 	# Quad9 says pointless performance impact on forwarders.
 	# https://docs.quad9.net/Quad9_For_Organizations/DNS_Forwarder_Best_Practices/#disable-qname-minimization
 	qname-minimisation: no
-	# Private ECS is more accurate with IPv4 than IPv6.
-	prefer-ip4: yes
-	prefer-ip6: no
 # AdGuard Public DNS without filtering.
 forward-zone:
 	name: "."