diff --git a/libavcodec/targa_y216dec.c b/libavcodec/targa_y216dec.c
index 21b3d35d67..443d48a92f 100644
--- a/libavcodec/targa_y216dec.c
+++ b/libavcodec/targa_y216dec.c
@@ -35,7 +35,8 @@ static int y216_decode_frame(AVCodecContext *avctx, void *data,
 {
     AVFrame *pic = data;
     const uint16_t *src = (uint16_t *)avpkt->data;
-    uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4);
+    uint16_t *y, *u, *v;
+    int aligned_width = FFALIGN(avctx->width, 4);
     int i, j, ret;
 
     if (avpkt->size < 4 * avctx->height * aligned_width) {