diff --git a/libavcodec/ppc/dsputil_altivec.c b/libavcodec/ppc/dsputil_altivec.c
index f292bf6143..3f1d50747d 100644
--- a/libavcodec/ppc/dsputil_altivec.c
+++ b/libavcodec/ppc/dsputil_altivec.c
@@ -1702,7 +1702,7 @@ static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
                                             int blocksize)
 {
     int i;
-    vector float m, a;
+    vector float m, a, s0, s1;
     vector bool int t0, t1;
     const vector unsigned int v_31 = //XXX
         vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
@@ -1711,11 +1711,11 @@ static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
         a = vec_ld(0, ang+i);
         t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
         t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
-        a = vec_xor(a, vec_sl((vector unsigned int)t0, v_31)); // (a ^ sign(m))
-        t0 = vec_and(a, t1);
-        t1 = vec_andc(a, t1);
-        a = vec_add(m, t0);
-        m = vec_sub(m, t1);
+        a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
+        s0 = vec_and(a, t1);
+        s1 = vec_andc(a, t1);
+        a = vec_add(m, s0);
+        m = vec_sub(m, s1);
         vec_ste(a, 0, ang+i);
         vec_ste(m, 0, mag+i);
     }