diff --git a/dnn/vec.h b/dnn/vec.h
index c3f88dfe..8e96cbf3 100644
--- a/dnn/vec.h
+++ b/dnn/vec.h
@@ -32,6 +32,7 @@
 #include "opus_types.h"
 #include <math.h>
 #include "arch.h"
+#include "x86/x86_arch_macros.h"
 
 
 #if defined(__AVX__) || defined(__SSE2__)