diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index c441629d96..5dd4965671 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -490,11 +490,6 @@ static const AVClass avfilter_class = {
     .child_class_next = filter_child_class_next,
 };
 
-const AVClass *avfilter_get_class(void)
-{
-    return &avfilter_class;
-}
-
 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
 {
     AVFilterContext *ret;
@@ -1038,3 +1033,8 @@ int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
         return ff_filter_frame_framed(link, frame);
     }
 }
+
+const AVClass *avfilter_get_class(void)
+{
+    return &avfilter_class;
+}
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index b19d652f86..effa4070bb 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -60,11 +60,6 @@ const char *avfilter_configuration(void);
  */
 const char *avfilter_license(void);
 
-/**
- * Get the class for the AVFilterContext struct.
- */
-const AVClass *avfilter_get_class(void);
-
 typedef struct AVFilterContext AVFilterContext;
 typedef struct AVFilterLink    AVFilterLink;
 typedef struct AVFilterPad     AVFilterPad;
@@ -910,8 +905,14 @@ attribute_deprecated
 int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src);
 #endif
 
+/**
+ * @return AVClass for AVFilterContext.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *avfilter_get_class(void);
+
 /**
  * @}
  */
-
 #endif /* AVFILTER_AVFILTER_H */