diff --git a/src/main/java/io/kamax/mxisd/auth/AuthManager.java b/src/main/java/io/kamax/mxisd/auth/AuthManager.java
index 5404bde..7a62759 100644
--- a/src/main/java/io/kamax/mxisd/auth/AuthManager.java
+++ b/src/main/java/io/kamax/mxisd/auth/AuthManager.java
@@ -23,6 +23,7 @@ package io.kamax.mxisd.auth;
 import io.kamax.matrix.MatrixID;
 import io.kamax.matrix.ThreePid;
 import io.kamax.matrix._MatrixID;
+import io.kamax.matrix._ThreePid;
 import io.kamax.mxisd.UserIdType;
 import io.kamax.mxisd.auth.provider.AuthenticatorProvider;
 import io.kamax.mxisd.auth.provider.BackendAuthResult;
@@ -72,7 +73,7 @@ public class AuthManager {
                 }
 
                 UserAuthResult authResult = new UserAuthResult().success(result.getProfile().getDisplayName());
-                for (ThreePid pid : result.getProfile().getThreePids()) {
+                for (_ThreePid pid : result.getProfile().getThreePids()) {
                     authResult.withThreePid(pid.getMedium(), pid.getAddress());
                 }
                 log.info("{} was authenticated by {}, publishing 3PID mappings, if any", id, provider.getClass().getSimpleName());
diff --git a/src/main/java/io/kamax/mxisd/auth/provider/BackendAuthResult.java b/src/main/java/io/kamax/mxisd/auth/provider/BackendAuthResult.java
index a89566d..3002c50 100644
--- a/src/main/java/io/kamax/mxisd/auth/provider/BackendAuthResult.java
+++ b/src/main/java/io/kamax/mxisd/auth/provider/BackendAuthResult.java
@@ -20,7 +20,7 @@
 
 package io.kamax.mxisd.auth.provider;
 
-import io.kamax.matrix.ThreePid;
+import io.kamax.matrix._ThreePid;
 import io.kamax.mxisd.UserID;
 import io.kamax.mxisd.UserIdType;
 
@@ -32,13 +32,13 @@ public class BackendAuthResult {
     public static class BackendAuthProfile {
 
         private String displayName;
-        private Set<ThreePid> threePids = new HashSet<>();
+        private Set<_ThreePid> threePids = new HashSet<>();
 
         public String getDisplayName() {
             return displayName;
         }
 
-        public Set<ThreePid> getThreePids() {
+        public Set<_ThreePid> getThreePids() {
             return threePids;
         }
     }
@@ -85,7 +85,7 @@ public class BackendAuthResult {
         return profile;
     }
 
-    public BackendAuthResult withThreePid(ThreePid threePid) {
+    public BackendAuthResult withThreePid(_ThreePid threePid) {
         this.profile.threePids.add(threePid);
 
         return this;
diff --git a/src/main/java/io/kamax/mxisd/backend/memory/MemoryIdentityStore.java b/src/main/java/io/kamax/mxisd/backend/memory/MemoryIdentityStore.java
index c9fcd1b..8d14a95 100644
--- a/src/main/java/io/kamax/mxisd/backend/memory/MemoryIdentityStore.java
+++ b/src/main/java/io/kamax/mxisd/backend/memory/MemoryIdentityStore.java
@@ -162,7 +162,10 @@ public class MemoryIdentityStore implements AuthenticatorProvider, IDirectoryPro
             if (!StringUtils.equals(id.getUsername(), mxid.getLocalPart())) {
                 return BackendAuthResult.failure();
             } else {
-                return BackendAuthResult.success(mxid.getId(), UserIdType.MatrixID, "");
+                BackendAuthResult result = new BackendAuthResult();
+                id.getThreepids().forEach(result::withThreePid);
+                result.succeed(mxid.getId(), UserIdType.MatrixID.getId(), "");
+                return result;
             }
         }).orElseGet(BackendAuthResult::failure);
     }