diff --git a/reactos/lib/sdk/crt/time_new/ctime.c b/reactos/lib/sdk/crt/time_new/ctime.c
index 0a4ff152fbc..3502b06fa6d 100644
--- a/reactos/lib/sdk/crt/time_new/ctime.c
+++ b/reactos/lib/sdk/crt/time_new/ctime.c
@@ -8,11 +8,15 @@
 #define MINGW_HAS_SECURE_API 1
 
 #include <tchar.h>
+#define __STDC_WANT_SECURE_LIB__
 #include <time.h>
 #include "bitsfixup.h"
 
 #define EINVAL -1
 
+/* Doesn't really exist, but we need it here */
+_CRTIMP errno_t __cdecl localtime_s(struct tm *_Tm,const time_t *_Time);
+
 /******************************************************************************
  * \name _tctime_s
  * \brief Converts a time_t value into a string.