diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d7990023..141124c49 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 - Bugfix: Fixed restricted users usernames not being clickable. (#5405)
 - Bugfix: Fixed a crash that could occur when logging was enabled in IRC servers that were removed. (#5419)
 - Bugfix: Fixed message history occasionally not loading after a sleep. (#5457)
+- Bugfix: Fixed a crash when tab completing while having an invalid plugin loaded. (#5401)
 - Dev: Update Windows build from Qt 6.5.0 to Qt 6.7.1. (#5420)
 - Dev: Update vcpkg build Qt from 6.5.0 to 6.7.0, boost from 1.83.0 to 1.85.0, openssl from 3.1.3 to 3.3.0. (#5422)
 - Dev: Unsingletonize `ISoundController`. (#5462)
diff --git a/src/controllers/plugins/PluginController.cpp b/src/controllers/plugins/PluginController.cpp
index 8c2d80556..199e0f4e4 100644
--- a/src/controllers/plugins/PluginController.cpp
+++ b/src/controllers/plugins/PluginController.cpp
@@ -420,7 +420,7 @@ std::pair<bool, QStringList> PluginController::updateCustomCompletions(
 
     for (const auto &[name, pl] : this->plugins())
     {
-        if (!pl->error().isNull())
+        if (!pl->error().isNull() || pl->state_ == nullptr)
         {
             continue;
         }