diff --git a/boards/arc/nsim/support/mdb_em.args b/boards/arc/nsim/support/mdb_em.args
index 3908d4c3e70..3ac13c74293 100644
--- a/boards/arc/nsim/support/mdb_em.args
+++ b/boards/arc/nsim/support/mdb_em.args
@@ -61,3 +61,4 @@
 	-dmac_int_config=single_internal
 	-prop=nsim_mem-dev=uart0,kind=dwuart,base=0xf0000000,irq=24
 	-noprofile
+	-Xunaligned
diff --git a/boards/arc/nsim/support/mdb_em7d_v22.args b/boards/arc/nsim/support/mdb_em7d_v22.args
index d4d2060a4ba..ee08d802844 100644
--- a/boards/arc/nsim/support/mdb_em7d_v22.args
+++ b/boards/arc/nsim/support/mdb_em7d_v22.args
@@ -46,3 +46,4 @@
 	-dmac_int_config=single_internal
 	-prop=nsim_mem-dev=uart0,kind=dwuart,base=0xf0000000,irq=24
 	-noprofile
+	-Xunaligned