diff --git a/lib/strtoofft.h b/lib/strtoofft.h
index c5bbccc84..9944ba1d9 100644
--- a/lib/strtoofft.h
+++ b/lib/strtoofft.h
@@ -41,12 +41,20 @@
 #if SIZEOF_CURL_OFF_T > 4
 #if HAVE_STRTOLL
 #define strtoofft strtoll
-#else
+#else /* HAVE_STRTOLL */
+
+/* For MSVC7 we can use _strtoi64() which seems to be a strtoll() clone */
+#if defined(_MSC_VER) && (_MSC_VER >= 1300)
+#define strtoll _strtoi64
+#else /* MSVC7 or later */
 curl_off_t curlx_strtoll(const char *nptr, char **endptr, int base);
 #define strtoofft curlx_strtoll
 #define NEED_CURL_STRTOLL
-#endif
-#else
+#endif /* MSVC7 or later */
+
+#endif /* HAVE_STRTOLL */
+#else /* SIZEOF_CURL_OFF_T > 4 */
+/* simply use strtol() to get 32bit numbers */
 #define strtoofft strtol
 #endif