diff --git a/lib/Database.php b/lib/Database.php
index b2a7aa38..799968fb 100644
--- a/lib/Database.php
+++ b/lib/Database.php
@@ -245,6 +245,15 @@ class Database {
         return (bool) $this->db->prepare("SELECT count(*) from arsse_users where id = ?", "str")->run($user)->getValue();
     }
 
+    /** Returns the username associated with a user number */
+    public function userLookup(int $num): string {
+        $out = $this->db->prepare("SELECT id from arsse_users where num = ?", "int")->run($num)->getValue();
+        if ($out === null) {
+            throw new User\ExceptionConflict("doesNotExist", ["action" => __FUNCTION__, "user" => $num]);
+        }
+        return $out;
+    }
+
     /** Adds a user to the database
      *
      * @param string $user The user to add
diff --git a/lib/REST/Miniflux/V1.php b/lib/REST/Miniflux/V1.php
index 5b1f51df..1107b600 100644
--- a/lib/REST/Miniflux/V1.php
+++ b/lib/REST/Miniflux/V1.php
@@ -287,7 +287,12 @@ class V1 extends \JKingWeb\Arsse\REST\AbstractHandler {
     }
 
     protected function getUserByNum(array $path, array $query, array $data) {
-        return $this->listUsers([Arsse::$user->id], false)[0] ?? [];
+        try {
+            $user = Arsse::$user->lookup((int) $path[1]);
+            return new Response($this->listUsers([$user], true)[0] ?? new \stdClass);
+        } catch (UserException $e) {
+            return new ErrorResponse("404", 404);
+        }
     }
     
     protected function getCurrentUser(array $path, array $query, array $data) {
diff --git a/lib/User.php b/lib/User.php
index bf457a95..5ab1b111 100644
--- a/lib/User.php
+++ b/lib/User.php
@@ -62,6 +62,11 @@ class User {
         return $this->u->userList();
     }
 
+    public function lookup(int $num): string {
+        // the user number is always stored in the internal database, so the user driver is not called here
+        return Arsse::$db->userLookup($num);
+    }
+
     public function add(string $user, ?string $password = null): string {
         // ensure the user name does not contain any U+003A COLON characters, as
         // this is incompatible with HTTP Basic authentication
diff --git a/tests/cases/Database/SeriesUser.php b/tests/cases/Database/SeriesUser.php
index 9ca140c7..7ed01822 100644
--- a/tests/cases/Database/SeriesUser.php
+++ b/tests/cases/Database/SeriesUser.php
@@ -169,4 +169,15 @@ trait SeriesUser {
         $this->assertException("doesNotExist", "User", "ExceptionConflict");
         Arsse::$db->userPropertiesSet("john.doe@example.org", ['admin' => true]);
     }
+
+    public function testLookUpAUserByNumber(): void {
+        $this->assertSame("admin@example.net", Arsse::$db->userLookup(1));
+        $this->assertSame("jane.doe@example.com", Arsse::$db->userLookup(2));
+        $this->assertSame("john.doe@example.com", Arsse::$db->userLookup(3));
+    }
+
+    public function testLookUpAMissingUserByNumber(): void {
+        $this->assertException("doesNotExist", "User", "ExceptionConflict");
+        Arsse::$db->userLookup(2112);
+    }
 }
diff --git a/tests/cases/REST/Miniflux/TestV1.php b/tests/cases/REST/Miniflux/TestV1.php
index 401c1bf9..065b2762 100644
--- a/tests/cases/REST/Miniflux/TestV1.php
+++ b/tests/cases/REST/Miniflux/TestV1.php
@@ -192,12 +192,32 @@ class TestV1 extends \JKingWeb\Arsse\Test\AbstractTest {
                 return $u[0];
             } elseif ($user === "jane.doe@example.com") {
                 return $u[1];
-            }else {
+            } else {
+                throw $u[2];
+            }
+        });
+        Arsse::$user->method("lookup")->willReturnCallback(function(int $num) use ($u) {
+            if ($num === 1) {
+                return "john.doe@example.com";
+            } elseif ($num === 2) {
+                return "jane.doe@example.com";
+            } else {
                 throw $u[2];
             }
         });
         $this->h = $this->createPartialMock(V1::class, ["now"]);
         $this->h->method("now")->willReturn($now);
+        // list all users
         $this->assertMessage(new Response($exp), $this->req("GET", "/users"));
+        // fetch John
+        $this->assertMessage(new Response($exp[0]), $this->req("GET", "/me"));
+        $this->assertMessage(new Response($exp[0]), $this->req("GET", "/users/john.doe@example.com"));
+        $this->assertMessage(new Response($exp[0]), $this->req("GET", "/users/1"));
+        // fetch Jane
+        $this->assertMessage(new Response($exp[1]), $this->req("GET", "/users/jane.doe@example.com"));
+        $this->assertMessage(new Response($exp[1]), $this->req("GET", "/users/2"));
+        // fetch no one
+        $this->assertMessage(new ErrorResponse("404", 404), $this->req("GET", "/users/jack.doe@example.com"));
+        $this->assertMessage(new ErrorResponse("404", 404), $this->req("GET", "/users/47"));
     }
 }
diff --git a/tests/cases/User/TestUser.php b/tests/cases/User/TestUser.php
index 84228cac..b7d1266e 100644
--- a/tests/cases/User/TestUser.php
+++ b/tests/cases/User/TestUser.php
@@ -90,6 +90,15 @@ class TestUser extends \JKingWeb\Arsse\Test\AbstractTest {
         \Phake::verify($this->drv)->userList();
     }
 
+    public function testLookUpAUserByNumber(): void {
+        $exp = "john.doe@example.com";
+        $u = new User($this->drv);
+        \Phake::when(Arsse::$db)->userLookup->thenReturn($exp);
+        $this->assertSame($exp, $u->lookup(2112));
+        \Phake::verify(Arsse::$db)->userLookup(2112);
+    }
+
+
     public function testAddAUser(): void {
         $user = "john.doe@example.com";
         $pass = "secret";