--- /dev/null
+--- a/configure.ac
++++ b/configure.ac
+@@ -2904,6 +2904,7 @@ CURL_VERIFY_RUNTIMELIBS
+
+ AC_CHECK_SIZEOF(size_t)
+ AC_CHECK_SIZEOF(long)
++AC_CHECK_SIZEOF(long long)
+ AC_CHECK_SIZEOF(int)
+ AC_CHECK_SIZEOF(short)
+ CURL_CONFIGURE_LONG