diff --git a/osdep/BSDEthernetTap.cpp b/osdep/BSDEthernetTap.cpp
index 36e70ca7c..82ac07d1a 100644
--- a/osdep/BSDEthernetTap.cpp
+++ b/osdep/BSDEthernetTap.cpp
@@ -339,7 +339,7 @@ std::vector<InetAddress> BSDEthernetTap::ips() const
 		freeifaddrs(ifa);
 
 	std::sort(r.begin(), r.end());
-	std::unique(r.begin(), r.end());
+	r.erase(std::unique(r.begin(), r.end()), r.end());
 
 	_ifaddrs = r;
 
@@ -394,7 +394,7 @@ void BSDEthernetTap::scanMulticastGroups(std::vector<MulticastGroup>& added, std
 		newGroups.push_back(MulticastGroup::deriveMulticastGroupForAddressResolution(*ip));
 
 	std::sort(newGroups.begin(), newGroups.end());
-	std::unique(newGroups.begin(), newGroups.end());
+	newGroups.erase(std::unique(newGroups.begin(), newGroups.end()), newGroups.end());
 
 	for (std::vector<MulticastGroup>::iterator m(newGroups.begin()); m != newGroups.end(); ++m) {
 		if (! std::binary_search(_multicastGroups.begin(), _multicastGroups.end(), *m))
diff --git a/osdep/MacKextEthernetTap.cpp b/osdep/MacKextEthernetTap.cpp
index 707858fd9..399742929 100644
--- a/osdep/MacKextEthernetTap.cpp
+++ b/osdep/MacKextEthernetTap.cpp
@@ -607,7 +607,7 @@ void MacKextEthernetTap::scanMulticastGroups(std::vector<MulticastGroup>& added,
 		newGroups.push_back(MulticastGroup::deriveMulticastGroupForAddressResolution(*ip));
 
 	std::sort(newGroups.begin(), newGroups.end());
-	std::unique(newGroups.begin(), newGroups.end());
+	newGroups.erase(std::unique(newGroups.begin(), newGroups.end()), newGroups.end());
 
 	for (std::vector<MulticastGroup>::iterator m(newGroups.begin()); m != newGroups.end(); ++m) {
 		if (! std::binary_search(_multicastGroups.begin(), _multicastGroups.end(), *m))
diff --git a/osdep/NetBSDEthernetTap.cpp b/osdep/NetBSDEthernetTap.cpp
index 666a387f6..aa923bdb3 100644
--- a/osdep/NetBSDEthernetTap.cpp
+++ b/osdep/NetBSDEthernetTap.cpp
@@ -316,7 +316,7 @@ std::vector<InetAddress> NetBSDEthernetTap::ips() const
 		freeifaddrs(ifa);
 
 	std::sort(r.begin(), r.end());
-	std::unique(r.begin(), r.end());
+	r.erase(std::unique(r.begin(), r.end()), r.end());
 
 	return r;
 }
@@ -367,7 +367,7 @@ void NetBSDEthernetTap::scanMulticastGroups(std::vector<MulticastGroup>& added,
 		newGroups.push_back(MulticastGroup::deriveMulticastGroupForAddressResolution(*ip));
 
 	std::sort(newGroups.begin(), newGroups.end());
-	std::unique(newGroups.begin(), newGroups.end());
+	newGroups.erase(std::unique(newGroups.begin(), newGroups.end()), newGroups.end());
 
 	for (std::vector<MulticastGroup>::iterator m(newGroups.begin()); m != newGroups.end(); ++m) {
 		if (! std::binary_search(_multicastGroups.begin(), _multicastGroups.end(), *m))