diff --git a/meta-digi-dey/recipes-graphics/microwindows/microwindows-0.91/0002-Arch.rules-remove-mstructure-size-boundary-8-flag.patch b/meta-digi-dey/recipes-graphics/microwindows/microwindows-0.91/0002-Arch.rules-remove-mstructure-size-boundary-8-flag.patch
new file mode 100644
index 000000000..85a93778d
--- /dev/null
+++ b/meta-digi-dey/recipes-graphics/microwindows/microwindows-0.91/0002-Arch.rules-remove-mstructure-size-boundary-8-flag.patch
@@ -0,0 +1,24 @@
+From: Jose Diaz de Grenu <Jose.DiazdeGrenu@digi.com>
+Date: Fri, 2 Aug 2019 14:28:35 +0200
+Subject: [PATCH] Arch.rules: remove 'mstructure-size-boundary' flag
+
+This flag is not supported in ARM64 toolchains.
+
+Signed-off-by: Jose Diaz de Grenu <Jose.DiazdeGrenu@digi.com>
+---
+ Arch.rules | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Arch.rules b/Arch.rules
+index b01225d0f514..2fd57bf635b9 100644
+--- a/Arch.rules
++++ b/Arch.rules
+@@ -46,7 +46,7 @@ COMPILER = gcc
+ CXX_COMPILER = g++
+ TOOLSPREFIX = $(ARMTOOLSPREFIX)
+ DEFINES += -DLINUX=1 -DUNIX=1
+-CFLAGS += $(GCC_WARNINGS) $(OPTFLAGS) -mstructure-size-boundary=8
++CFLAGS += $(GCC_WARNINGS) $(OPTFLAGS)
+ LDFLAGS +=
+ endif
+ 
diff --git a/meta-digi-dey/recipes-graphics/microwindows/microwindows_0.91.bb b/meta-digi-dey/recipes-graphics/microwindows/microwindows_0.91.bb
index 6f2fc5f6d..8ac4aacd4 100644
--- a/meta-digi-dey/recipes-graphics/microwindows/microwindows_0.91.bb
+++ b/meta-digi-dey/recipes-graphics/microwindows/microwindows_0.91.bb
@@ -11,6 +11,8 @@ SRC_URI = " \
     file://0001-defconfig.patch;striplevel=2 \
 "
 
+SRC_URI_append_aarch64 = " file://0002-Arch.rules-remove-mstructure-size-boundary-8-flag.patch; "
+
 SRC_URI[md5sum] = "901e912cf3975f6460a9bb4325557645"
 SRC_URI[sha256sum] = "c0a8473842fc757ff4c225f82b83d98bba5da0dca0cf843cfc7792064a393435"