diff --git a/swing/src/net/sf/openrocket/gui/dialogs/motor/thrustcurve/MotorFilterPanel.java b/swing/src/net/sf/openrocket/gui/dialogs/motor/thrustcurve/MotorFilterPanel.java
index 421c4f3c8..e54f686ce 100644
--- a/swing/src/net/sf/openrocket/gui/dialogs/motor/thrustcurve/MotorFilterPanel.java
+++ b/swing/src/net/sf/openrocket/gui/dialogs/motor/thrustcurve/MotorFilterPanel.java
@@ -151,7 +151,9 @@ public abstract class MotorFilterPanel extends JPanel {
 
 			@Override
 			public void contentsChanged(ListDataEvent e) {
-				MotorFilterPanel.this.filter.setExcludedManufacturers( manufacturerCheckList.getUncheckedItems() );
+				Collection<Manufacturer> uncheckedManufacturers = manufacturerCheckList.getUncheckedItems();
+				MotorFilterPanel.this.filter.setExcludedManufacturers( uncheckedManufacturers );
+				((SwingPreferences) Application.getPreferences()).setExcludedMotorManufacturers(uncheckedManufacturers);
 				onSelectionChanged();
 			}
 		});