diff --git a/api/net/sf/briar/api/db/DatabaseComponent.java b/api/net/sf/briar/api/db/DatabaseComponent.java
index ae0f59424..5671f13f1 100644
--- a/api/net/sf/briar/api/db/DatabaseComponent.java
+++ b/api/net/sf/briar/api/db/DatabaseComponent.java
@@ -151,6 +151,9 @@ public interface DatabaseComponent {
 	/** Records the user's rating for the given author. */
 	void setRating(AuthorId a, Rating r) throws DbException;
 
+	/** Sets the local transport details, replacing any existing details. */
+	void setTransports(Map<String, String> transports) throws DbException;
+
 	/**
 	 * Makes the given group visible to the given set of contacts and invisible
 	 * to any other contacts.
diff --git a/components/net/sf/briar/db/ReadWriteLockDatabaseComponent.java b/components/net/sf/briar/db/ReadWriteLockDatabaseComponent.java
index 5f698cbc4..1b1d2bb16 100644
--- a/components/net/sf/briar/db/ReadWriteLockDatabaseComponent.java
+++ b/components/net/sf/briar/db/ReadWriteLockDatabaseComponent.java
@@ -902,6 +902,29 @@ class ReadWriteLockDatabaseComponent<Txn> extends DatabaseComponentImpl<Txn> {
 		}
 	}
 
+	public void setTransports(Map<String, String> transports)
+	throws DbException {
+		boolean changed = false;
+		transportLock.writeLock().lock();
+		try {
+			Txn txn = db.startTransaction();
+			try {
+				if(!transports.equals(db.getTransports(txn))) {
+					db.setTransports(txn, transports);
+					changed = true;
+				}
+				db.commitTransaction(txn);
+			} catch(DbException e) {
+				db.abortTransaction(txn);
+				throw e;
+			}
+		} finally {
+			transportLock.writeLock().unlock();
+		}
+		// Call the listeners outside the lock
+		if(changed) callListeners(DatabaseListener.Event.TRANSPORTS_UPDATED);
+	}
+
 	public void setVisibility(GroupId g, Collection<ContactId> visible)
 	throws DbException {
 		contactLock.readLock().lock();
diff --git a/components/net/sf/briar/db/SynchronizedDatabaseComponent.java b/components/net/sf/briar/db/SynchronizedDatabaseComponent.java
index 5bf42d643..a5f58fa0f 100644
--- a/components/net/sf/briar/db/SynchronizedDatabaseComponent.java
+++ b/components/net/sf/briar/db/SynchronizedDatabaseComponent.java
@@ -668,6 +668,26 @@ class SynchronizedDatabaseComponent<Txn> extends DatabaseComponentImpl<Txn> {
 		}
 	}
 
+	public void setTransports(Map<String, String> transports)
+	throws DbException {
+		boolean changed = false;
+		synchronized(transportLock) {
+			Txn txn = db.startTransaction();
+			try {
+				if(!transports.equals(db.getTransports(txn))) {
+					db.setTransports(txn, transports);
+					changed = true;
+				}
+				db.commitTransaction(txn);
+			} catch(DbException e) {
+				db.abortTransaction(txn);
+				throw e;
+			}
+		}
+		// Call the listeners outside the lock
+		if(changed) callListeners(DatabaseListener.Event.TRANSPORTS_UPDATED);
+	}
+
 	public void setVisibility(GroupId g, Collection<ContactId> visible)
 	throws DbException {
 		synchronized(contactLock) {
diff --git a/test/net/sf/briar/db/DatabaseComponentTest.java b/test/net/sf/briar/db/DatabaseComponentTest.java
index 4deefed87..a4ccdcfef 100644
--- a/test/net/sf/briar/db/DatabaseComponentTest.java
+++ b/test/net/sf/briar/db/DatabaseComponentTest.java
@@ -1100,4 +1100,52 @@ public abstract class DatabaseComponentTest extends TestCase {
 
 		context.assertIsSatisfied();
 	}
+
+	@Test
+	public void testTransportsChangedCallsListeners() throws Exception {
+		Mockery context = new Mockery();
+		@SuppressWarnings("unchecked")
+		final Database<Object> database = context.mock(Database.class);
+		final DatabaseCleaner cleaner = context.mock(DatabaseCleaner.class);
+		final DatabaseListener listener = context.mock(DatabaseListener.class);
+		context.checking(new Expectations() {{
+			oneOf(database).startTransaction();
+			will(returnValue(txn));
+			oneOf(database).getTransports(txn);
+			will(returnValue(Collections.singletonMap("foo", "bar")));
+			oneOf(database).setTransports(txn,
+					Collections.singletonMap("bar", "baz"));
+			oneOf(database).commitTransaction(txn);
+			oneOf(listener).eventOccurred(
+					DatabaseListener.Event.TRANSPORTS_UPDATED);
+		}});
+		DatabaseComponent db = createDatabaseComponent(database, cleaner);
+
+		db.addListener(listener);
+		db.setTransports(Collections.singletonMap("bar", "baz"));
+
+		context.assertIsSatisfied();
+	}
+
+	@Test
+	public void testTransportsUnchangedDoesNotCallListeners() throws Exception {
+		Mockery context = new Mockery();
+		@SuppressWarnings("unchecked")
+		final Database<Object> database = context.mock(Database.class);
+		final DatabaseCleaner cleaner = context.mock(DatabaseCleaner.class);
+		final DatabaseListener listener = context.mock(DatabaseListener.class);
+		context.checking(new Expectations() {{
+			oneOf(database).startTransaction();
+			will(returnValue(txn));
+			oneOf(database).getTransports(txn);
+			will(returnValue(Collections.singletonMap("bar", "baz")));
+			oneOf(database).commitTransaction(txn);
+		}});
+		DatabaseComponent db = createDatabaseComponent(database, cleaner);
+
+		db.addListener(listener);
+		db.setTransports(Collections.singletonMap("bar", "baz"));
+
+		context.assertIsSatisfied();
+	}
 }