diff --git a/lib/include/srslte/phy/utils/simd.h b/lib/include/srslte/phy/utils/simd.h
index 35bcf1492..024de72e4 100644
--- a/lib/include/srslte/phy/utils/simd.h
+++ b/lib/include/srslte/phy/utils/simd.h
@@ -2044,7 +2044,7 @@ static inline simd_b_t srslte_simd_b_sub(simd_b_t a, simd_b_t b)
 #endif /* LV_HAVE_AVX512 */
 }
 
-static inline simd_s_t srslte_simd_b_neg(simd_b_t a, simd_b_t b)
+static inline simd_b_t srslte_simd_b_neg(simd_b_t a, simd_b_t b)
 {
 #ifdef LV_HAVE_AVX512
   __m256i a0 = _mm512_extracti64x4_epi64(a, 0);
diff --git a/lib/src/phy/utils/vector_simd.c b/lib/src/phy/utils/vector_simd.c
index 3127c3a66..9b0100511 100644
--- a/lib/src/phy/utils/vector_simd.c
+++ b/lib/src/phy/utils/vector_simd.c
@@ -258,19 +258,19 @@ void srslte_vec_neg_bbb_simd(const int8_t* x, const int8_t* y, int8_t* z, const
 #if SRSLTE_SIMD_B_SIZE
   if (SRSLTE_IS_ALIGNED(x) && SRSLTE_IS_ALIGNED(y) && SRSLTE_IS_ALIGNED(z)) {
     for (; i < len - SRSLTE_SIMD_B_SIZE + 1; i += SRSLTE_SIMD_B_SIZE) {
-      simd_s_t a = srslte_simd_b_load(&x[i]);
-      simd_s_t b = srslte_simd_b_load(&y[i]);
+      simd_b_t a = srslte_simd_b_load(&x[i]);
+      simd_b_t b = srslte_simd_b_load(&y[i]);
 
-      simd_s_t r = srslte_simd_b_neg(a, b);
+      simd_b_t r = srslte_simd_b_neg(a, b);
 
       srslte_simd_b_store(&z[i], r);
     }
   } else {
     for (; i < len - SRSLTE_SIMD_B_SIZE + 1; i += SRSLTE_SIMD_B_SIZE) {
-      simd_s_t a = srslte_simd_b_loadu(&x[i]);
-      simd_s_t b = srslte_simd_b_loadu(&y[i]);
+      simd_b_t a = srslte_simd_b_loadu(&x[i]);
+      simd_b_t b = srslte_simd_b_loadu(&y[i]);
 
-      simd_s_t r = srslte_simd_b_neg(a, b);
+      simd_b_t r = srslte_simd_b_neg(a, b);
 
       srslte_simd_b_storeu(&z[i], r);
     }