diff --git a/include/libtorrent/enum_net.hpp b/include/libtorrent/enum_net.hpp
index b97061b0d..b0a41f324 100644
--- a/include/libtorrent/enum_net.hpp
+++ b/include/libtorrent/enum_net.hpp
@@ -74,6 +74,7 @@ namespace libtorrent {
 		address destination;
 		address netmask;
 		address gateway;
+		address source_hint;
 		char name[64]{};
 		int mtu;
 	};
diff --git a/src/enum_net.cpp b/src/enum_net.cpp
index 7b9758bc5..5d9cab47a 100644
--- a/src/enum_net.cpp
+++ b/src/enum_net.cpp
@@ -281,6 +281,9 @@ namespace {
 				case RTA_DST:
 					rt_info->destination = to_address(rt_msg->rtm_family, RTA_DATA(rt_attr));
 					break;
+				case RTA_PREFSRC:
+					rt_info->source_hint = to_address(rt_msg->rtm_family, RTA_DATA(rt_attr));
+					break;
 			}
 		}
 #ifdef __clang__
@@ -396,6 +399,7 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
 		rt_info->netmask = sockaddr_to_address(rti_info[RTAX_NETMASK]
 			, rt_info->destination.is_v4() ? AF_INET : AF_INET6);
 		if_indextoname(rtm->rtm_index, rt_info->name);
+		if (rti_info[RTAX_IFA]) rt_info->source_hint = sockaddr_to_address(rti_info[RTAX_IFA]);
 		return true;
 	}
 #endif
@@ -798,6 +802,10 @@ int _System __libsocket_sysctl(int* mib, u_int namelen, void *oldp, size_t *oldl
 					// interface, but they are addressed by the local network address
 					// space. So this check only works for IPv4.
 					&& (!v4 || match_addr_mask(r.gateway, iface.interface_address, iface.netmask))
+					// in case there are multiple networks on the same networking
+					// device, the source hint may be the only thing telling them
+					// apart
+					&& (r.source_hint.is_unspecified() || r.source_hint == iface.interface_address)
 					&& strcmp(r.name, iface.name) == 0;
 			});
 		if (it != routes.end()) return it->gateway;
diff --git a/test/enum_if.cpp b/test/enum_if.cpp
index 1b3c530a8..481343045 100644
--- a/test/enum_if.cpp
+++ b/test/enum_if.cpp
@@ -50,15 +50,16 @@ int main()
 		return 1;
 	}
 
-	std::printf("%-18s%-18s%-35s%-7sinterface\n", "destination", "network", "gateway", "mtu");
+	std::printf("%-18s%-18s%-35s%-7s%-18sinterface\n", "destination", "network", "gateway", "mtu", "source-hint");
 
 	for (auto const& r : routes)
 	{
-		std::printf("%-18s%-18s%-35s%-7d%s\n"
+		std::printf("%-18s%-18s%-35s%-7d%-18s%s\n"
 			, r.destination.to_string(ec).c_str()
 			, r.netmask.to_string(ec).c_str()
 			, r.gateway.is_unspecified() ? "-" : r.gateway.to_string(ec).c_str()
 			, r.mtu
+			, r.source_hint.is_unspecified() ? "-" : r.source_hint.to_string(ec).c_str()
 			, r.name);
 	}