diff --git a/lib/nvme/nvme_pcie.c b/lib/nvme/nvme_pcie.c
index cb3c6fba2..976e4b73c 100644
--- a/lib/nvme/nvme_pcie.c
+++ b/lib/nvme/nvme_pcie.c
@@ -1095,18 +1095,7 @@ static inline void
 nvme_pcie_copy_command(struct spdk_nvme_cmd *dst, const struct spdk_nvme_cmd *src)
 {
 	/* dst and src are known to be non-overlapping and 64-byte aligned. */
-#if defined(__AVX512F__)
-	__m512i *d512 = (__m512i *)dst;
-	const __m512i *s512 = (const __m512i *)src;
-
-	_mm512_stream_si512(d512, _mm512_load_si512(s512));
-#elif defined(__AVX__)
-	__m256i *d256 = (__m256i *)dst;
-	const __m256i *s256 = (const __m256i *)src;
-
-	_mm256_stream_si256(&d256[0], _mm256_load_si256(&s256[0]));
-	_mm256_stream_si256(&d256[1], _mm256_load_si256(&s256[1]));
-#elif defined(__SSE2__)
+#if defined(__SSE2__)
 	__m128i *d128 = (__m128i *)dst;
 	const __m128i *s128 = (const __m128i *)src;