diff --git a/source/Irrlicht/Irrlicht.xcodeproj/project.pbxproj b/source/Irrlicht/Irrlicht.xcodeproj/project.pbxproj
index 89c46bc5..0553beda 100644
--- a/source/Irrlicht/Irrlicht.xcodeproj/project.pbxproj
+++ b/source/Irrlicht/Irrlicht.xcodeproj/project.pbxproj
@@ -3195,7 +3195,10 @@
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
-				"GCC_PREPROCESSOR_DEFINITIONS[arch=*]" = "DEBUG=1";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"PNG_ARM_NEON_OPT=0",
+				);
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -3245,7 +3248,10 @@
 				GCC_C_LANGUAGE_STANDARD = c11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = fast;
-				"GCC_PREPROCESSOR_DEFINITIONS[arch=*]" = "NDEBUG=1";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"NDEBUG=1",
+					"PNG_ARM_NEON_OPT=0",
+				);
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
diff --git a/source/Irrlicht/libpng/pngrtran.c b/source/Irrlicht/libpng/pngrtran.c
index 54a48646..a3cac0fc 100644
--- a/source/Irrlicht/libpng/pngrtran.c
+++ b/source/Irrlicht/libpng/pngrtran.c
@@ -18,8 +18,7 @@
 
 #include "pngpriv.h"
 
-// iOS Undefined symbols for architecture arm64
-/*#ifdef PNG_ARM_NEON_IMPLEMENTATION
+#ifdef PNG_ARM_NEON_IMPLEMENTATION
 #  if PNG_ARM_NEON_IMPLEMENTATION == 1
 #    define PNG_ARM_NEON_INTRINSICS_AVAILABLE
 #    if defined(_MSC_VER) && defined(_M_ARM64)
@@ -28,7 +27,7 @@
 #      include <arm_neon.h>
 #    endif
 #  endif
-#endif*/
+#endif
 
 #ifdef PNG_READ_SUPPORTED