diff --git a/3rdparty/libpng/pngpriv.h b/3rdparty/libpng/pngpriv.h
index 07b2b0b..e7824b8 100644
--- a/3rdparty/libpng/pngpriv.h
+++ b/3rdparty/libpng/pngpriv.h
@@ -360,7 +360,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
 
 /* Memory model/platform independent fns */
 #ifndef PNG_ABORT
-#  ifdef _WINDOWS_
+#  if defined(_WINDOWS_) && !defined(WINRT)
 #    define PNG_ABORT() ExitProcess(0)
 #  else
 #    define PNG_ABORT() abort()
@@ -378,7 +378,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
 #  define png_memcpy  _fmemcpy
 #  define png_memset  _fmemset
 #else
-#  ifdef _WINDOWS_  /* Favor Windows over C runtime fns */
+#  if defined(_WINDOWS_) && !defined(WINRT)  /* Favor Windows over C runtime fns */
 #    define CVT_PTR(ptr)         (ptr)
 #    define CVT_PTR_NOCHECK(ptr) (ptr)
 #    define png_strlen  lstrlenA