diff --git a/source/Irrlicht/libpng/pngrtran.c b/source/Irrlicht/libpng/pngrtran.c
index a3cac0fc..0ec7c13a 100644
--- a/source/Irrlicht/libpng/pngrtran.c
+++ b/source/Irrlicht/libpng/pngrtran.c
@@ -18,16 +18,17 @@
 
 #include "pngpriv.h"
 
-#ifdef PNG_ARM_NEON_IMPLEMENTATION
+// iOS Undefined symbols for architecture arm64
+/*#ifdef PNG_ARM_NEON_IMPLEMENTATION
 #  if PNG_ARM_NEON_IMPLEMENTATION == 1
-#    define PNG_ARM_NEON_INTRINSICS_AVAILABLE
+#    define PNG_ARM_NEON_INTRINSICS_AVAILABLE 
 #    if defined(_MSC_VER) && defined(_M_ARM64)
 #      include <arm64_neon.h>
 #    else
 #      include <arm_neon.h>
 #    endif
 #  endif
-#endif
+#endif*/
 
 #ifdef PNG_READ_SUPPORTED