diff --git a/src/wp-includes/meta.php b/src/wp-includes/meta.php
index 2f272f4cdd..3397ef11ae 100644
--- a/src/wp-includes/meta.php
+++ b/src/wp-includes/meta.php
@@ -137,8 +137,9 @@ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_v
 	if ( !$meta_type || !$meta_key )
 		return false;
 
-	if ( !$object_id = absint($object_id) )
+	if ( ! is_numeric( $object_id ) || ! $object_id = absint( $object_id ) ) {
 		return false;
+	}
 
 	if ( ! $table = _get_meta_table($meta_type) )
 		return false;
diff --git a/tests/phpunit/tests/user.php b/tests/phpunit/tests/user.php
index 976ef53da7..f9484ed388 100644
--- a/tests/phpunit/tests/user.php
+++ b/tests/phpunit/tests/user.php
@@ -627,4 +627,18 @@ class Tests_User extends WP_UnitTestCase {
 		// If this test fails, it will error out for calling the to_array() method on a non-object.
 		$this->assertInstanceOf( 'WP_Error', wp_update_user( array( 'ID' => $user_id ) ) );
 	}
+
+	/**
+	 * @ticket 28315
+	 */
+	function test_user_meta_error() {
+		$this->factory->user->create( array( 'user_email' => 'taco@burrito.com' ) );
+		$id = $this->factory->user->create( array( 'user_email' => 'taco@burrito.com' ) );
+
+		$this->assertWPError( $id );
+		@update_user_meta( $id, 'key', 'value' );
+
+		$metas = array_keys( get_user_meta( 1 ) );
+		$this->assertNotContains( 'key', $metas );
+	}
 }