diff --git a/src/arch/x86/AVX2.cpp b/src/arch/x86/AVX2.cpp
index bf1082e..3f295ad 100644
--- a/src/arch/x86/AVX2.cpp
+++ b/src/arch/x86/AVX2.cpp
@@ -35,7 +35,10 @@ namespace hat::detail {
             secondByte = _mm256_set1_epi8(static_cast<int8_t>(*signature[1]));
         }
 
-        alignas(__m256i) const auto [signatureBytes, signatureMask] = load_signature_256(signature);
+        __m256i signatureBytes, signatureMask;
+        if constexpr (veccmp) {
+            std::tie(signatureBytes, signatureMask) = load_signature_256(signature);
+        }
 
         begin = next_boundary_align<alignment>(begin);
         if (begin >= end) {
diff --git a/src/arch/x86/AVX512.cpp b/src/arch/x86/AVX512.cpp
index 97bb2c6..4211b86 100644
--- a/src/arch/x86/AVX512.cpp
+++ b/src/arch/x86/AVX512.cpp
@@ -35,7 +35,11 @@ namespace hat::detail {
             secondByte = _mm512_set1_epi8(static_cast<int8_t>(*signature[1]));
         }
 
-        alignas(__m512i) const auto [signatureBytes, signatureMask] = load_signature_512(signature);
+        __m512i signatureBytes;
+        uint64_t signatureMask;
+        if constexpr (veccmp) {
+            std::tie(signatureBytes, signatureMask) = load_signature_512(signature);
+        }
 
         begin = next_boundary_align<alignment>(begin);
         if (begin >= end) {
diff --git a/src/arch/x86/SSE.cpp b/src/arch/x86/SSE.cpp
index 060c0f1..a3b26a9 100644
--- a/src/arch/x86/SSE.cpp
+++ b/src/arch/x86/SSE.cpp
@@ -35,7 +35,10 @@ namespace hat::detail {
             secondByte = _mm_set1_epi8(static_cast<int8_t>(*signature[1]));
         }
 
-        alignas(__m128i) const auto [signatureBytes, signatureMask] = load_signature_128(signature);
+        __m128i signatureBytes, signatureMask;
+        if constexpr (veccmp) {
+            std::tie(signatureBytes, signatureMask) = load_signature_128(signature);
+        }
 
         begin = next_boundary_align<alignment>(begin);
         if (begin >= end) {