diff --git a/include/recoil/split/rans_split_decoder.h b/include/recoil/split/rans_split_decoder.h
index f5e4ce6..6095f1f 100644
--- a/include/recoil/split/rans_split_decoder.h
+++ b/include/recoil/split/rans_split_decoder.h
@@ -5,9 +5,12 @@
 #include "recoil/rans_coded_data.h"
 #include "recoil/rans_decoder.h"
 #include "recoil/simd/rans_decoder_avx2_32x32.h"
-//#include "recoil/simd/rans_decoder_avx512_32x32.h"
 #include <span>
 
+#ifdef AVX512
+#include "recoil/simd/rans_decoder_avx512_32x32.h"
+#endif
+
 namespace Recoil {
     template<std::unsigned_integral CdfType, std::unsigned_integral ValueType,
             std::unsigned_integral RansStateType, std::unsigned_integral RansBitstreamType,
@@ -24,8 +27,12 @@ namespace Recoil {
         // TODO: allow any class derived from RansDecoder, from a template parameter
         //using MyRansDecoder = RansDecoder<
         //        CdfType, ValueType, RansStateType, RansBitstreamType, ProbBits, RenormLowerBound, WriteBits, LutGranularity, NInterleaved>;
+#ifdef AVX512
+        using MyRansDecoder = RansDecoder_AVX512_32x32<ValueType, ProbBits, RenormLowerBound, LutGranularity>;
+#else
         using MyRansDecoder = RansDecoder_AVX2_32x32<ValueType, ProbBits, RenormLowerBound, LutGranularity>;
-        //using MyRansDecoder = RansDecoder_AVX512_32x32<ValueType, ProbBits, RenormLowerBound, LutGranularity>;
+#endif
+
     public:
         std::vector<ValueType> result;
 
diff --git a/include/recoil/split/rans_symbol_split_decoder.h b/include/recoil/split/rans_symbol_split_decoder.h
index 3cdab18..b5f1cb3 100644
--- a/include/recoil/split/rans_symbol_split_decoder.h
+++ b/include/recoil/split/rans_symbol_split_decoder.h
@@ -6,10 +6,13 @@
 #include "recoil/rans_coded_data.h"
 #include "recoil/rans_decoder.h"
 #include "recoil/simd/rans_decoder_avx2_32x32.h"
-//#include "recoil/simd/rans_decoder_avx512_32x32.h"
 #include <span>
 #include <numeric>
 
+#ifdef AVX512
+#include "recoil/simd/rans_decoder_avx512_32x32.h"
+#endif
+
 namespace Recoil {
     template<std::unsigned_integral CdfType, std::unsigned_integral ValueType,
             std::unsigned_integral RansStateType, std::unsigned_integral RansBitstreamType,
@@ -24,8 +27,11 @@ namespace Recoil {
         // TODO: allow any class derived from RansDecoder, from a template parameter
         //using MyRansDecoder = RansDecoder<
         //        CdfType, ValueType, RansStateType, RansBitstreamType, ProbBits, RenormLowerBound, WriteBits, LutGranularity, NInterleaved>;
+#ifdef AVX512
+        using MyRansDecoder = RansDecoder_AVX512_32x32<ValueType, ProbBits, RenormLowerBound, LutGranularity>;
+#else
         using MyRansDecoder = RansDecoder_AVX2_32x32<ValueType, ProbBits, RenormLowerBound, LutGranularity>;
-        //using MyRansDecoder = RansDecoder_AVX512_32x32<ValueType, ProbBits, RenormLowerBound, LutGranularity>;
+#endif
     public:
         std::vector<ValueType> result;