diff --git a/runtime/lib/integers.cc b/runtime/lib/integers.cc
index f6133dd62b0..86492d1a4bd 100644
--- a/runtime/lib/integers.cc
+++ b/runtime/lib/integers.cc
@@ -193,10 +193,10 @@ DEFINE_NATIVE_ENTRY(Integer_parse, 1) {
       // a) '+5' is not a valid integer (leading plus).
       if (cstr[0] != '+') {
         char* p_end = NULL;
-        const int64_t int_value = strtol(cstr, &p_end, 10);
+        const int64_t int_value = strtoll(cstr, &p_end, 10);
         if (p_end == (cstr + len)) {
-          if ((Smi::kMinValue <= int_value) && (int_value <= Smi::kMaxValue)) {
-            return Smi::New(int_value);
+          if ((int_value != LLONG_MIN) && (int_value != LLONG_MAX)) {
+            return Integer::New(int_value);
           }
         }
       }
diff --git a/runtime/platform/c99_support_win.h b/runtime/platform/c99_support_win.h
index 2859f0c970b..71ec1270974 100644
--- a/runtime/platform/c99_support_win.h
+++ b/runtime/platform/c99_support_win.h
@@ -65,4 +65,10 @@ static inline double round(double x) {
   }
 }
 
+// Windows does not have strtoll defined.
+#if defined(_MSC_VER)
+#define strtoll _strtoi64
+#endif
+
+
 #endif  // PLATFORM_C99_SUPPORT_WIN_H_