diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index c9ee0f43..3eedda45 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -100,12 +100,17 @@ Index of this file:
 // Play it nice with Windows users. Notepad in 2017 still doesn't display text data with Unix-style \n.
 #ifdef _WIN32
 #define IM_NEWLINE  "\r\n"
-#define snprintf    _snprintf
-#define vsnprintf   _vsnprintf
 #else
 #define IM_NEWLINE  "\n"
 #endif
 
+#if defined(_MSC_VER) && !defined(snprintf)
+#define snprintf    _snprintf
+#endif
+#if defined(_MSC_VER) && !defined(vsnprintf)
+#define vsnprintf   _vsnprintf
+#endif
+
 //-----------------------------------------------------------------------------
 // [SECTION] Forward Declarations, Helpers
 //-----------------------------------------------------------------------------