diff --git a/sim/msp430/ChangeLog b/sim/msp430/ChangeLog
index 41da2a734b..345c804306 100644
--- a/sim/msp430/ChangeLog
+++ b/sim/msp430/ChangeLog
@@ -1,3 +1,8 @@
+2020-08-07  Jozef Lawrynowicz  <jozef.l@mittosystems.com>
+
+	* msp430-sim.c (sim_open): Increase the size of the main memory region
+	to 0xFAC0.
+
 2020-08-05  Jozef Lawrynowicz  <jozef.l@mittosystems.com>
 
 	* msp430-sim.c (put_op): For unsigned multiplication, explicitly cast
diff --git a/sim/msp430/msp430-sim.c b/sim/msp430/msp430-sim.c
index a330c6caf5..7be32cb62e 100644
--- a/sim/msp430/msp430-sim.c
+++ b/sim/msp430/msp430-sim.c
@@ -138,7 +138,7 @@ sim_open (SIM_OPEN_KIND kind,
   if (sim_core_read_buffer (sd, MSP430_CPU (sd), read_map, &c, 0x2, 1) == 0)
     sim_do_commandf (sd, "memory-region 0,0x20"); /* Needed by the GDB testsuite.  */
   if (sim_core_read_buffer (sd, MSP430_CPU (sd), read_map, &c, 0x500, 1) == 0)
-    sim_do_commandf (sd, "memory-region 0x500,0xfa00");  /* RAM and/or ROM */
+    sim_do_commandf (sd, "memory-region 0x500,0xfac0");  /* RAM and/or ROM */
   if (sim_core_read_buffer (sd, MSP430_CPU (sd), read_map, &c, 0xfffe, 1) == 0)
     sim_do_commandf (sd, "memory-region 0xffc0,0x40"); /* VECTORS.  */
   if (sim_core_read_buffer (sd, MSP430_CPU (sd), read_map, &c, 0x10000, 1) == 0)