diff --git a/B9AerospaceProceduralParts/B9AerospaceProceduralParts-0.40.ckan b/B9AerospaceProceduralParts/B9AerospaceProceduralParts-0.40.ckan
index 1fe376a6a9..bed106a39b 100644
--- a/B9AerospaceProceduralParts/B9AerospaceProceduralParts-0.40.ckan
+++ b/B9AerospaceProceduralParts/B9AerospaceProceduralParts-0.40.ckan
@@ -19,6 +19,11 @@
             "name": "CrossFeedEnabler"
         }
     ],
+    "conflicts": [
+        {
+            "name": "B9-PWings-Fork"
+        }
+    ],
     "install": [
         {
             "file": "GameData/B9_Aerospace",