diff --git a/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp b/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp
index 8da85ec6eb..4cedcd5976 100644
--- a/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp
+++ b/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp
@@ -61,6 +61,7 @@ template<typename Addressing> status_t
 MulticastGroupInterface<Addressing>::Drop()
 {
 	fAddresses.Clear();
+	Addressing::LeaveGroup(this);
 	fFilterMode = kInclude;
 	return B_OK;
 }
diff --git a/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp b/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp
index f21e4beeb4..da4071c7cb 100644
--- a/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp
+++ b/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp
@@ -50,6 +50,7 @@ template<typename Addressing> status_t
 MulticastGroupInterface<Addressing>::Drop()
 {
 	fAddresses.Clear();
+	Addressing::LeaveGroup(this);
 	fFilterMode = kInclude;
 	return B_OK;
 }