Index: mozilla/configure.in
===================================================================
--- mozilla.orig/configure.in
+++ mozilla/configure.in
@@ -6241,7 +6241,7 @@ fi
 
 dnl If we're on an ARM system which supports libjpeg-turbo's asm routines and
 dnl --disable-libjpeg-turbo wasn't passed, use the C compiler as the assembler.
-if test -n "$LIBJPEG_TURBO_ARM_ASM" ; then
+if test -n "$LIBJPEG_TURBO_ARM_ASM" -o -n "$LIBJPEG_TURBO_ARM64_ASM" ; then
     echo "Using $AS as the assembler for ARM code."
     LIBJPEG_TURBO_AS=$AS
 fi
@@ -6252,6 +6252,8 @@ elif test -n "$LIBJPEG_TURBO_X64_ASM"; t
     AC_DEFINE(LIBJPEG_TURBO_X64_ASM)
 elif test -n "$LIBJPEG_TURBO_ARM_ASM"; then
     AC_DEFINE(LIBJPEG_TURBO_ARM_ASM)
+elif test -n "$LIBJPEG_TURBO_ARM64_ASM"; then
+    AC_DEFINE(LIBJPEG_TURBO_ARM64_ASM)
 elif test -n "$MOZ_LIBJPEG_TURBO"; then
     dnl Warn if we're not building the optimized routines, even though the user
     dnl didn't specify --disable-libjpeg-turbo.