diff --git a/libavcodec/cfhdenc.c b/libavcodec/cfhdenc.c
index f2096f0986..1ab83c311b 100644
--- a/libavcodec/cfhdenc.c
+++ b/libavcodec/cfhdenc.c
@@ -369,7 +369,7 @@ static av_cold int cfhd_encode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static inline void filter(int16_t *input, ptrdiff_t in_stride,
+static av_always_inline void filter(int16_t *input, ptrdiff_t in_stride,
                           int16_t *low, ptrdiff_t low_stride,
                           int16_t *high, ptrdiff_t high_stride,
                           int len)