diff --git a/lib/viterbi_decoder/base.h b/lib/viterbi_decoder/base.h
index 0c2d66b..908f3b7 100644
--- a/lib/viterbi_decoder/base.h
+++ b/lib/viterbi_decoder/base.h
@@ -41,9 +41,9 @@ protected:
     // Position in circular buffer where the current decoded byte is stored
     int d_store_pos;
     // Metrics for each state
-    unsigned char d_mmresult[64] __attribute__((aligned(16)));
+    alignas(16) unsigned char d_mmresult[64];
     // Paths for each state
-    unsigned char d_ppresult[TRACEBACK_MAX][64] __attribute__((aligned(16)));
+    alignas(16) unsigned char d_ppresult[TRACEBACK_MAX][64];
 
     int d_ntraceback;
     int d_k;
diff --git a/lib/viterbi_decoder/viterbi_decoder_generic.h b/lib/viterbi_decoder/viterbi_decoder_generic.h
index 35ea4d5..6229e40 100644
--- a/lib/viterbi_decoder/viterbi_decoder_generic.h
+++ b/lib/viterbi_decoder/viterbi_decoder_generic.h
@@ -37,10 +37,10 @@ private:
         unsigned char c[32];
     } d_branchtab27_generic[2];
 
-    unsigned char d_metric0_generic[64] __attribute__((aligned(16)));
-    unsigned char d_metric1_generic[64] __attribute__((aligned(16)));
-    unsigned char d_path0_generic[64] __attribute__((aligned(16)));
-    unsigned char d_path1_generic[64] __attribute__((aligned(16)));
+    alignas(16) unsigned char d_metric0_generic[64];
+    alignas(16) unsigned char d_metric1_generic[64];
+    alignas(16) unsigned char d_path0_generic[64];
+    alignas(16) unsigned char d_path1_generic[64];
 
     void reset();
 
diff --git a/lib/viterbi_decoder/viterbi_decoder_x86.h b/lib/viterbi_decoder/viterbi_decoder_x86.h
index f3986ed..808fbe2 100644
--- a/lib/viterbi_decoder/viterbi_decoder_x86.h
+++ b/lib/viterbi_decoder/viterbi_decoder_x86.h
@@ -39,10 +39,10 @@ private:
         __m128i v[2];
     } d_branchtab27_sse2[2];
 
-    __m128i d_metric0[4] __attribute__((aligned(16)));
-    __m128i d_metric1[4] __attribute__((aligned(16)));
-    __m128i d_path0[4] __attribute__((aligned(16)));
-    __m128i d_path1[4] __attribute__((aligned(16)));
+    alignas(16) __m128i d_metric0[4];
+    alignas(16) __m128i d_metric1[4];
+    alignas(16) __m128i d_path0[4];
+    alignas(16) __m128i d_path1[4];
 
     virtual void reset();