diff --git a/libavcodec/ra144enc.c b/libavcodec/ra144enc.c
index ceae878039..e0fb827856 100644
--- a/libavcodec/ra144enc.c
+++ b/libavcodec/ra144enc.c
@@ -347,7 +347,8 @@ static void ra144_encode_subblock(RA144Context *ractx,
     float zero[BLOCKSIZE], cba[BLOCKSIZE], cb1[BLOCKSIZE], cb2[BLOCKSIZE];
     int16_t cba_vect[BLOCKSIZE];
     int cba_idx, cb1_idx, cb2_idx, gain;
-    int i, n, m[3];
+    int i, n;
+    unsigned m[3];
     float g[3];
     float error, best_error;