--- src/SFML/Graphics/ImageLoader.cpp
+++ src/SFML/Graphics/ImageLoader.cpp
@@ -44,7 +44,7 @@
     void PngErrorHandler(png_structp Png, png_const_charp Message)
     {
         std::cerr << "Failed to write PNG image. Reason : " << Message << std::endl;
-        longjmp(Png->jmpbuf, 1);
+        longjmp(png_jmpbuf(Png), 1);
     }
 }
 
@@ -289,7 +289,7 @@
     }
 
     // For proper error handling...
-    if (setjmp(Png->jmpbuf))
+    if (setjmp(png_jmpbuf(Png)))
     {
         png_destroy_write_struct(&Png, &PngInfo);
         return false;