diff --git a/src/http_stream.cpp b/src/http_stream.cpp
index 94a865bb..1233e044 100644
--- a/src/http_stream.cpp
+++ b/src/http_stream.cpp
@@ -13,6 +13,7 @@
 #include <algorithm>
 #include <memory>
 #include <mutex>
+#define __STDC_WANT_LIB_EXT1__ 1
 #include <ctime>
 using std::cerr;
 using std::endl;