diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 4c05be937c..08bd36acad 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -5578,7 +5578,7 @@ av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
 {
     int i;
     for (i = 0; i < 64; i++) {
-#define transpose(x) ((x >> 3) | ((x & 7) << 3))
+#define transpose(x) (((x) >> 3) | (((x) & 7) << 3))
         v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);
         v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);
         v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 1783041c20..354be087ba 100644
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -1740,7 +1740,7 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
     ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
 
     for (i = 0; i < 64; i++) {
-#define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
+#define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
         s->idct_permutation[i] = TRANSPOSE(i);
         s->idct_scantable[i]   = TRANSPOSE(ff_zigzag_direct[i]);
 #undef TRANSPOSE