diff --git a/include/SDL_config_windows.h b/include/SDL_config_windows.h
index faaef72ec..9241fccf9 100644
--- a/include/SDL_config_windows.h
+++ b/include/SDL_config_windows.h
@@ -169,6 +169,7 @@ typedef unsigned int uintptr_t;
 /* These functions were added with the VC++ 2013 C runtime library */
 #if _MSC_VER >= 1800
 #define HAVE_STRTOLL 1
+#define HAVE_STRTOULL 1
 #define HAVE_VSSCANF 1
 #define HAVE_LROUND 1
 #define HAVE_LROUNDF 1
diff --git a/include/SDL_config_winrt.h b/include/SDL_config_winrt.h
index 6b40bc97c..2bdad15af 100644
--- a/include/SDL_config_winrt.h
+++ b/include/SDL_config_winrt.h
@@ -132,6 +132,7 @@ typedef unsigned int uintptr_t;
 #define HAVE_STRTOL 1
 #define HAVE_STRTOUL 1
 /* #undef HAVE_STRTOLL */
+/* #undef HAVE_STRTOULL */
 #define HAVE_STRTOD 1
 #define HAVE_ATOI 1
 #define HAVE_ATOF 1