diff -ur pdfium.org/third_party/libopenjpeg/ht_dec.c pdfium/third_party/libopenjpeg/ht_dec.c
--- pdfium.org/third_party/libopenjpeg/ht_dec.c	2022-07-28 15:19:17.366247900 +0200
+++ pdfium/third_party/libopenjpeg/ht_dec.c	2022-07-28 15:23:25.641843900 +0200
@@ -69,7 +69,7 @@
 static INLINE
 OPJ_UINT32 population_count(OPJ_UINT32 val)
 {
-#ifdef OPJ_COMPILER_MSVC
+#if defined(OPJ_COMPILER_MSVC) && !defined(_ARM64_)
     return (OPJ_UINT32)__popcnt(val);
 #elif (defined OPJ_COMPILER_GNUC)
     return (OPJ_UINT32)__builtin_popcount(val);