--- a/layout/style/ServoBindingList.h
+++ b/layout/style/ServoBindingList.h
@@ -125,17 +125,17 @@ SERVO_BINDING_FUNC(Servo_StyleSet_BuildF
                    gfxFontFeatureValueSet*,
                    RawServoStyleSetBorrowed set)
 SERVO_BINDING_FUNC(Servo_StyleSet_ResolveForDeclarations,
                    ServoStyleContextStrong,
                    RawServoStyleSetBorrowed set,
                    ServoStyleContextBorrowedOrNull parent_style,
                    RawServoDeclarationBlockBorrowed declarations)
 SERVO_BINDING_FUNC(Servo_SelectorList_Drop, void,
-                   RawServoSelectorList* selector_list)
+                   RawServoSelectorListOwned selector_list)
 SERVO_BINDING_FUNC(Servo_SelectorList_Parse,
                    RawServoSelectorList*,
                    const nsACString* selector_list)
 SERVO_BINDING_FUNC(Servo_SelectorList_Matches, bool,
                    RawGeckoElementBorrowed, RawServoSelectorListBorrowed)
 SERVO_BINDING_FUNC(Servo_StyleSet_AddSizeOfExcludingThis, void,
                    mozilla::MallocSizeOf malloc_size_of,
                    mozilla::MallocSizeOf malloc_enclosing_size_of,