diff --git a/src/google/protobuf/parse_context.h b/src/google/protobuf/parse_context.h
index d40e71c1dc..abc33d9e8c 100644
--- a/src/google/protobuf/parse_context.h
+++ b/src/google/protobuf/parse_context.h
@@ -635,7 +635,7 @@ inline const char* VarintParseSlow(const char* p, uint32_t res, uint64_t* out) {
   return tmp.first;
 }
 
-#ifdef __aarch64__
+#ifdef __aarch64__ && !defined(_MSC_VER)
 // Generally, speaking, the ARM-optimized Varint decode algorithm is to extract
 // and concatenate all potentially valid data bits, compute the actual length
 // of the Varint, and mask off the data bits which are not actually part of the