diff --git a/gui/builtinAdditionPanes/boosterView.py b/gui/builtinAdditionPanes/boosterView.py
index 7802b44bd..8923f83de 100644
--- a/gui/builtinAdditionPanes/boosterView.py
+++ b/gui/builtinAdditionPanes/boosterView.py
@@ -131,6 +131,7 @@ class BoosterView(d.Display):
         fit = sFit.getFit(fitID)
 
         if not fit or fit.isStructure:
+            event.Skip()
             return
 
         trigger = sFit.addBooster(fitID, event.itemID)
diff --git a/gui/builtinAdditionPanes/droneView.py b/gui/builtinAdditionPanes/droneView.py
index 41327618b..e9b893047 100644
--- a/gui/builtinAdditionPanes/droneView.py
+++ b/gui/builtinAdditionPanes/droneView.py
@@ -210,6 +210,7 @@ class DroneView(Display):
         fit = sFit.getFit(fitID)
 
         if not fit or fit.isStructure:
+            event.Skip()
             return
 
         trigger = sFit.addDrone(fitID, event.itemID)
diff --git a/gui/builtinAdditionPanes/implantView.py b/gui/builtinAdditionPanes/implantView.py
index 8e043702f..b1d7bbe66 100644
--- a/gui/builtinAdditionPanes/implantView.py
+++ b/gui/builtinAdditionPanes/implantView.py
@@ -152,6 +152,7 @@ class ImplantDisplay(d.Display):
         fit = sFit.getFit(fitID)
 
         if not fit or fit.isStructure:
+            event.Skip()
             return
 
         trigger = sFit.addImplant(fitID, event.itemID)