diff --git a/lib/audiodev/AudioMatrix.hpp b/lib/audiodev/AudioMatrix.hpp
index 931295d..ccc31f1 100644
--- a/lib/audiodev/AudioMatrix.hpp
+++ b/lib/audiodev/AudioMatrix.hpp
@@ -34,8 +34,8 @@ class AudioMatrixMono {
   union Coefs {
     float v[8];
 #if __SSE__
-    __m128 q[2];
-    __m64 d[4];
+    alignas(16) __m128 q[2];
+    alignas(16) __m64 d[4];
 #endif
   };
   Coefs m_coefs = {};
@@ -88,8 +88,8 @@ class AudioMatrixStereo {
   union Coefs {
     float v[8][2];
 #if __SSE__
-    __m128 q[4];
-    __m64 d[8];
+    alignas(16) __m128 q[4];
+    alignas(16) __m64 d[8];
 #endif
   };
   Coefs m_coefs = {};
diff --git a/lib/audiodev/AudioMatrixSSE.cpp b/lib/audiodev/AudioMatrixSSE.cpp
index ac8b6de..11a1616 100644
--- a/lib/audiodev/AudioMatrixSSE.cpp
+++ b/lib/audiodev/AudioMatrixSSE.cpp
@@ -8,8 +8,8 @@ namespace boo {
 union TVectorUnion {
   float v[4];
 #if __SSE__
-  __m128 q;
-  __m64 d[2];
+  alignas(16) __m128 q;
+  alignas(16) __m64 d[2];
 #endif
 };