diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c
index 287f35f305..e5c3daece6 100644
--- a/libavcodec/motionpixels.c
+++ b/libavcodec/motionpixels.c
@@ -70,7 +70,6 @@ static av_cold int mp_decode_end(AVCodecContext *avctx)
 
 static av_cold int mp_decode_init(AVCodecContext *avctx)
 {
-    av_unused static AVOnce init_static_once = AV_ONCE_INIT;
     MotionPixelsContext *mp = avctx->priv_data;
     int w4 = (avctx->width  + 3) & ~3;
     int h4 = (avctx->height + 3) & ~3;
@@ -95,6 +94,7 @@ static av_cold int mp_decode_init(AVCodecContext *avctx)
         return AVERROR(ENOMEM);
 
 #if !CONFIG_HARDCODED_TABLES
+    static AVOnce init_static_once = AV_ONCE_INIT;
     ff_thread_once(&init_static_once, motionpixels_tableinit);
 #endif