diff --git a/modals/project_link_closed_ticket_modal.php b/modals/project_link_closed_ticket_modal.php
new file mode 100644
index 00000000..be93b6ab
--- /dev/null
+++ b/modals/project_link_closed_ticket_modal.php
@@ -0,0 +1,42 @@
+<div class="modal" id="linkClosedTicketModal" tabindex="-1">
+    <div class="modal-dialog">
+        <div class="modal-content bg-dark">
+            <div class="modal-header">
+                <h5 class="modal-title"><i class="fas fa-fw fa-life-ring mr-2"></i>Link closed ticket to project: <strong><?php echo $project_name; ?></strong></h5>
+                <button type="button" class="close text-white" data-dismiss="modal">
+                    <span>&times;</span>
+                </button>
+            </div>
+            <form action="post.php" method="post" autocomplete="off">
+                <input type="hidden" name="project_id" value="<?php echo $project_id; ?>">
+                <div class="modal-body bg-white">
+
+                    <div class="form-group">
+                        <label>Ticket number <strong class="text-danger">*</strong></label>
+                        <div class="input-group">
+                            <div class="input-group-prepend">
+                                <?php
+                                // Show the ticket prefix, or just the tag icon
+                                $config_row = mysqli_fetch_array(mysqli_query($mysqli, "SELECT config_ticket_prefix FROM settings WHERE company_id = 1"));
+                                $config_ticket_prefix = $config_row['config_ticket_prefix'];
+                                if (empty($config_ticket_prefix)) {
+                                    echo "<span class=\"input-group-text\"><i class=\"fa fa-fw fa-tag\"></i></span>";
+                                } else {
+                                    echo "<div class=\"input-group-text\"> $config_ticket_prefix </div>";
+                                }
+                                ?>
+                            </div>
+                            <input type="text" class="form-control" name="ticket_number" inputmode="numeric" pattern="[0-9]*\.?[0-9]{0,2}" placeholder="Closed ticket number to link with project" required>
+                        </div>
+                    </div>
+
+                </div>
+
+                <div class="modal-footer bg-white">
+                    <button type="submit" name="link_closed_ticket_to_project" class="btn btn-primary text-bold"><i class="fas fa-check mr-2"></i>Link</button>
+                    <button type="button" class="btn btn-light" data-dismiss="modal"><i class="fas fa-times mr-2"></i>Cancel</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
diff --git a/post/user/project.php b/post/user/project.php
index 39e5d618..bf02acde 100644
--- a/post/user/project.php
+++ b/post/user/project.php
@@ -234,3 +234,38 @@ if (isset($_POST['link_ticket_to_project'])) {
 
     header("Location: " . $_SERVER["HTTP_REFERER"]);
 }
+
+if (isset($_POST['link_closed_ticket_to_project'])) {
+
+    enforceUserPermission('module_support', 2);
+    $project_id = intval($_POST['project_id']);
+    $ticket_number = intval($_POST['ticket_number']);
+
+    // Get Project Name and Client ID for logging
+    $sql = mysqli_query($mysqli, "SELECT project_client_id, project_name FROM projects WHERE project_id = $project_id");
+    $row = mysqli_fetch_array($sql);
+    $client_id = intval($row['project_client_id']);
+    $project_name = sanitizeInput($row['project_name']);
+
+    // Get ticket details
+    $sql = mysqli_query($mysqli, "SELECT ticket_id, ticket_prefix, ticket_number, ticket_subject, ticket_updated_at FROM tickets WHERE ticket_number = $ticket_number");
+    if (mysqli_num_rows($sql) == 0) {
+        $_SESSION['alert_message'] = "Cannot merge into that ticket.";
+        header("Location: " . $_SERVER["HTTP_REFERER"]);
+        exit();
+    }
+    $row = mysqli_fetch_array($sql);
+    $ticket_id = intval($row['ticket_id']);
+    $ticket_prefix = sanitizeInput($row['ticket_prefix']);
+    $ticket_number = intval($row['ticket_number']);
+    $ticket_subject = sanitizeInput($row['ticket_subject']);
+    $ticket_updated = sanitizeInput($row['ticket_updated_at']); // So we don't mess with the last response
+
+    mysqli_query($mysqli, "UPDATE tickets SET ticket_project_id = $project_id, ticket_updated_at = '$ticket_updated' WHERE ticket_id = $ticket_id");
+
+    // Logging
+    logAction("Project", "Edit", "$session_name added ticket $ticket_prefix$ticket_number - $ticket_subject to project $project_name", $client_id, $project_id);
+
+    $_SESSION['alert_message'] = "Ticket added to <strong>$project_name</strong>";
+    header("Location: " . $_SERVER["HTTP_REFERER"]);
+}
\ No newline at end of file
diff --git a/project_details.php b/project_details.php
index ca303319..ba893ef7 100644
--- a/project_details.php
+++ b/project_details.php
@@ -235,6 +235,10 @@ if (isset($_GET['project_id'])) {
                                 <a class="dropdown-item" href="#" data-toggle="modal" data-target="#linkTicketModal">
                                     <i class="fas fa-fw fa-life-ring mr-2"></i>Open Ticket
                                 </a>
+                                <div class="dropdown-divider"></div>
+                                <a class="dropdown-item" href="#" data-toggle="modal" data-target="#linkClosedTicketModal">
+                                    <i class="fas fa-fw fa-life-ring mr-2"></i>Closed Ticket
+                                </a>
                             </div>
                         </div>
                     <?php } ?>
@@ -552,6 +556,7 @@ if (isset($_GET['project_id'])) {
     <?php
 
     require_once "modals/project_link_ticket_modal.php";
+    require_once "modals/project_link_closed_ticket_modal.php";
     require_once "modals/ticket_add_modal.php";
 
 }