diff --git a/libavfilter/vf_neighbor.c b/libavfilter/vf_neighbor.c
index 16a092c761..c35a8a7917 100644
--- a/libavfilter/vf_neighbor.c
+++ b/libavfilter/vf_neighbor.c
@@ -354,14 +354,12 @@ static const AVFilterPad neighbor_outputs[] = {
 #define OFFSET(x) offsetof(NContext, x)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
 
-#define DEFINE_NEIGHBOR_FILTER(name_, description_)          \
-AVFILTER_DEFINE_CLASS(name_);                                \
-                                                             \
+#define DEFINE_NEIGHBOR_FILTER(name_, description_, priv_class_) \
 const AVFilter ff_vf_##name_ = {                                   \
     .name          = #name_,                                 \
     .description   = NULL_IF_CONFIG_SMALL(description_),     \
+    .priv_class    = &priv_class_##_class,                   \
     .priv_size     = sizeof(NContext),                       \
-    .priv_class    = &name_##_class,                         \
     .query_formats = query_formats,                          \
     FILTER_INPUTS(neighbor_inputs),                          \
     FILTER_OUTPUTS(neighbor_outputs),                        \
@@ -384,30 +382,31 @@ static const AVOption options[] = {
     { NULL }
 };
 
+AVFILTER_DEFINE_CLASS_EXT(erosion_dilation, "erosion/dilation", options);
+
 #if CONFIG_EROSION_FILTER
 
-#define erosion_options options
-DEFINE_NEIGHBOR_FILTER(erosion, "Apply erosion effect.");
+DEFINE_NEIGHBOR_FILTER(erosion, "Apply erosion effect.", erosion_dilation);
 
 #endif /* CONFIG_EROSION_FILTER */
 
 #if CONFIG_DILATION_FILTER
 
-#define dilation_options options
-DEFINE_NEIGHBOR_FILTER(dilation, "Apply dilation effect.");
+DEFINE_NEIGHBOR_FILTER(dilation, "Apply dilation effect.", erosion_dilation);
 
 #endif /* CONFIG_DILATION_FILTER */
 
+AVFILTER_DEFINE_CLASS_EXT(deflate_inflate, "deflate/inflate",
+                          &options[DEINFLATE_OPTIONS_OFFSET]);
+
 #if CONFIG_DEFLATE_FILTER
 
-#define deflate_options &options[DEINFLATE_OPTIONS_OFFSET]
-DEFINE_NEIGHBOR_FILTER(deflate, "Apply deflate effect.");
+DEFINE_NEIGHBOR_FILTER(deflate, "Apply deflate effect.", deflate_inflate);
 
 #endif /* CONFIG_DEFLATE_FILTER */
 
 #if CONFIG_INFLATE_FILTER
 
-#define inflate_options &options[DEINFLATE_OPTIONS_OFFSET]
-DEFINE_NEIGHBOR_FILTER(inflate, "Apply inflate effect.");
+DEFINE_NEIGHBOR_FILTER(inflate, "Apply inflate effect.", deflate_inflate);
 
 #endif /* CONFIG_INFLATE_FILTER */