diff --git a/clang/lib/Headers/adxintrin.h b/clang/lib/Headers/adxintrin.h
--- a/clang/lib/Headers/adxintrin.h
+++ b/clang/lib/Headers/adxintrin.h
@@ -43,7 +43,10 @@
 }
 
 #ifdef __x86_64__
-static __inline unsigned char __DEFAULT_FN_ATTRS
+#if !defined(_MSC_VER)
+static
+#endif
+__inline unsigned char __DEFAULT_FN_ATTRS
 _addcarry_u64(unsigned char __cf, unsigned long long __x,
               unsigned long long __y, unsigned long long  *__p)
 {
@@ -59,7 +62,10 @@
 }
 
 #ifdef __x86_64__
-static __inline unsigned char __DEFAULT_FN_ATTRS
+#if !defined(_MSC_VER)
+static
+#endif
+__inline unsigned char __DEFAULT_FN_ATTRS
 _subborrow_u64(unsigned char __cf, unsigned long long __x,
                unsigned long long __y, unsigned long long  *__p)
 {