diff --git a/libraries/audio/src/avx512/AudioHRTF_avx512.cpp b/libraries/audio/src/avx512/AudioHRTF_avx512.cpp
index a8bb62be35..7b29d05e35 100644
--- a/libraries/audio/src/avx512/AudioHRTF_avx512.cpp
+++ b/libraries/audio/src/avx512/AudioHRTF_avx512.cpp
@@ -9,7 +9,7 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
-#ifdef __AVX512F__
+#if defined(zz__AVX512F__)
 
 #include <assert.h>
 #include <immintrin.h>
@@ -87,4 +87,15 @@ void FIR_1x4_AVX512(float* src, float* dst0, float* dst1, float* dst2, float* ds
     _mm256_zeroupper();
 }
 
+// FIXME: this fallback can be removed, once we require VS2017
+#elif defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__x86_64__)
+
+#include "../AudioHRTF.h"
+
+void FIR_1x4_AVX2(float* src, float* dst0, float* dst1, float* dst2, float* dst3, float coef[4][HRTF_TAPS], int numFrames);
+
+void FIR_1x4_AVX512(float* src, float* dst0, float* dst1, float* dst2, float* dst3, float coef[4][HRTF_TAPS], int numFrames) {
+        FIR_1x4_AVX2(src, dst0, dst1, dst2, dst3, coef, numFrames);
+}
+
 #endif