diff --git a/quill/quill/include/quill/detail/misc/RdtscClock.h b/quill/quill/include/quill/detail/misc/RdtscClock.h
index 88a9dc51..3f551d1b 100644
--- a/quill/quill/include/quill/detail/misc/RdtscClock.h
+++ b/quill/quill/include/quill/detail/misc/RdtscClock.h
@@ -10,6 +10,12 @@
 #include "quill/detail/misc/Attributes.h"
 #include <chrono>
 
+#if defined(_WIN32)
+  #include <intrin.h>
+#else
+  #include <x86intrin.h>
+#endif
+
 namespace quill
 {
 namespace detail