diff --git a/src/internal.hpp b/src/internal.hpp
index e059230..b793363 100755
--- a/src/internal.hpp
+++ b/src/internal.hpp
@@ -45,7 +45,9 @@
 
 #define SHUT_RDWR SD_BOTH
 typedef int socklen_t;
+#if _MSC_VER < 1900
 #define snprintf _snprintf
+#endif
 #define strdup _strdup
 #define stricmp _stricmp
 #define strdup _strdup