diff --git a/FilterExtension/Utility/PartType.cs b/FilterExtension/Utility/PartType.cs
index f5d0eedd..76f2b75a 100644
--- a/FilterExtension/Utility/PartType.cs
+++ b/FilterExtension/Utility/PartType.cs
@@ -308,7 +308,7 @@ public static bool checkModuleNameType(AvailablePart part, string value)
                         {
                             foreach (PartModule pm in ap.partPrefab.Modules)
                             {
-                                if (!loaded_modules.ContainsKey(pm.moduleName))
+                                if (!string.IsNullOrEmpty(pm.moduleName) && !loaded_modules.ContainsKey(pm.moduleName))
                                 {
                                     loaded_modules.Add(pm.moduleName, pm);
                                 }
diff --git a/GameData/000_FilterExtensions/FilterExtensions.dll b/GameData/000_FilterExtensions/FilterExtensions.dll
index 8550bff8..94c521a0 100644
Binary files a/GameData/000_FilterExtensions/FilterExtensions.dll and b/GameData/000_FilterExtensions/FilterExtensions.dll differ
diff --git a/Testing/FE_Testing.dll b/Testing/FE_Testing.dll
index 33258af1..4bd5a815 100644
Binary files a/Testing/FE_Testing.dll and b/Testing/FE_Testing.dll differ