diff --git a/src/libsodium/sodium/runtime.c b/src/libsodium/sodium/runtime.c
index 78f0a581..30cfc726 100644
--- a/src/libsodium/sodium/runtime.c
+++ b/src/libsodium/sodium/runtime.c
@@ -4,6 +4,10 @@
 #ifdef HAVE_ANDROID_GETCPUFEATURES
 # include <cpu-features.h>
 #endif
+#if defined(_MSC_VER) && \
+    (defined(_M_X64) || defined(_M_AMD64) || defined(_M_IX86))
+# include <intrin.h>
+#endif
 
 #include "runtime.h"