diff --git a/src/app/components/AvailableModulesMenu.jsx b/src/app/components/AvailableModulesMenu.jsx
index 6d10c191..2fc495d8 100644
--- a/src/app/components/AvailableModulesMenu.jsx
+++ b/src/app/components/AvailableModulesMenu.jsx
@@ -90,7 +90,7 @@ const CATEGORIES = {
   'experimental': ['axmc', 'axmr', 'rfl', 'xs', 'sfn', 'rcpl'],
 
   // Guardian
-  'guardian': ['gpp', 'gpc', 'ggc']
+  'guardian': ['gpp', 'gpd', 'gpc', 'ggc']
 };
 
 /**
diff --git a/src/app/components/StandardSlot.jsx b/src/app/components/StandardSlot.jsx
index 18ba79a1..54ce4733 100644
--- a/src/app/components/StandardSlot.jsx
+++ b/src/app/components/StandardSlot.jsx
@@ -67,6 +67,9 @@ export default class StandardSlot extends TranslatedComponent {
     if (m && m.name && m.name === 'Guardian Hybrid Power Plant') {
       validMods = [];
     }
+    if (m && m.name && m.name === 'Guardian Power Distributor') {
+      validMods = [];
+    }
     let showModuleResistances = Persist.showModuleResistances();
     let mass = m.getMass() || m.cargo || m.fuel || 0;