diff --git a/libavcodec/takdec.c b/libavcodec/takdec.c
index 886ca8a27f..738f1e4a4b 100644
--- a/libavcodec/takdec.c
+++ b/libavcodec/takdec.c
@@ -192,7 +192,7 @@ static void decode_lpc(int32_t *coeffs, int mode, int length)
         int a1 = *coeffs++;
         for (i = 0; i < length - 1 >> 1; i++) {
             *coeffs   += a1;
-            coeffs[1] += *coeffs;
+            coeffs[1] += (unsigned)*coeffs;
             a1         = coeffs[1];
             coeffs    += 2;
         }