diff --git a/src/cdef.rs b/src/cdef.rs
index 09a15006c..dcd8133c1 100644
--- a/src/cdef.rs
+++ b/src/cdef.rs
@@ -551,7 +551,7 @@ unsafe extern "C" fn cdef_filter_neon_erased<
     edges: CdefEdgeFlags,
     bitdepth_max: c_int,
     _dst: *const FFISafe<Rav1dPictureDataComponentOffset>,
-    _top: *const FFISafe<DisjointMut<AlignedVec64<u8>>>,
+    _top: *const FFISafe<CdefTop<'_>>,
     _bottom: *const FFISafe<CdefBottom<'_>>,
 ) {
     use crate::src::align::Align16;