diff --git a/sse-simd.cpp b/sse-simd.cpp
index 0bad4a48..87cbeaff 100644
--- a/sse-simd.cpp
+++ b/sse-simd.cpp
@@ -8,6 +8,7 @@
 
 #include "pch.h"
 #include "config.h"
+#include "cpu.h"
 
 #ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
 # include <signal.h>