diff --git a/demos/ARMCM3-STM32F103-GCC/ch.ld b/demos/ARMCM3-STM32F103-GCC/ch.ld
index 05fac9c8f..90a0093fe 100644
--- a/demos/ARMCM3-STM32F103-GCC/ch.ld
+++ b/demos/ARMCM3-STM32F103-GCC/ch.ld
@@ -20,8 +20,8 @@
 /*
  * ST32F103 memory setup.
  */
-__main_stack_size__     = 0x0400;
-__process_stack_size__  = 0x0100;
+__main_stack_size__     = 0x0200;
+__process_stack_size__  = 0x0400;
 __stacks_total_size__   = __main_stack_size__ + __process_stack_size__;
 
 MEMORY
diff --git a/readme.txt b/readme.txt
index d573f0184..23600191a 100644
--- a/readme.txt
+++ b/readme.txt
@@ -65,6 +65,8 @@ GNU-Linux-GCC          - ChibiOS/RT simulator for x86 Linux systems, it is
 
 *** 1.3.1 ***
 - Documentation fixes.
+- Changed the STM32 demo stack sizes, it was incorrectly adjusted in version
+  1.3.0 but it did not create problems (not a bug).
 
 *** 1.3.0 ***
 - FIX: Fixed regression in MinGW demo (bug 2745153)(backported in stable