diff a/third_party/libpng16/pngpriv.h b/third_party/libpng16/pngpriv.h
--- a/third_party/libpng16/pngpriv.h
+++ b/third_party/libpng16/pngpriv.h
@@ -127,7 +127,7 @@
     */
 #  if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \
    defined(PNG_ALIGNED_MEMORY_SUPPORTED)
-#     define PNG_ARM_NEON_OPT 2
+#     define PNG_ARM_NEON_OPT 0
 #  else
 #     define PNG_ARM_NEON_OPT 0
 #  endif