diff --git a/libavfilter/framesync.c b/libavfilter/framesync.c
index da12c58a61..22d3f091a3 100644
--- a/libavfilter/framesync.c
+++ b/libavfilter/framesync.c
@@ -61,7 +61,7 @@ enum {
 
 static int consume_from_fifos(FFFrameSync *fs);
 
-const AVClass *framesync_get_class(void)
+const AVClass *ff_framesync_get_class(void)
 {
     return &framesync_class;
 }
diff --git a/libavfilter/framesync.h b/libavfilter/framesync.h
index abf3bf552b..37743cccb7 100644
--- a/libavfilter/framesync.h
+++ b/libavfilter/framesync.h
@@ -211,7 +211,7 @@ typedef struct FFFrameSync {
 /**
  * Get the class for the framesync object.
  */
-const AVClass *framesync_get_class(void);
+const AVClass *ff_framesync_get_class(void);
 
 /**
  * Pre-initialize a frame sync structure.
@@ -304,11 +304,11 @@ static int name##_framesync_preinit(AVFilterContext *ctx) { \
     return 0; \
 } \
 static const AVClass *name##_child_class_next(const AVClass *prev) { \
-    return prev ? NULL : framesync_get_class(); \
+    return prev ? NULL : ff_framesync_get_class(); \
 } \
 static void *name##_child_next(void *obj, void *prev) { \
     context *s = obj; \
-    s->fs.class = framesync_get_class(); /* FIXME */ \
+    s->fs.class = ff_framesync_get_class(); /* FIXME */ \
     return prev ? NULL : &s->field; \
 } \
 static const AVClass name##_class = { \