diff --git a/demos/STM32/NIL-STM32F051-DISCOVERY/main.c b/demos/STM32/NIL-STM32F051-DISCOVERY/main.c
index 7e4e13e80..b97e53d2f 100644
--- a/demos/STM32/NIL-STM32F051-DISCOVERY/main.c
+++ b/demos/STM32/NIL-STM32F051-DISCOVERY/main.c
@@ -54,7 +54,7 @@ THD_FUNCTION(Thread2, arg) {
 /*
  * Thread 3.
  */
-THD_WORKING_AREA(waThread3, 128);
+THD_WORKING_AREA(waThread3, 256);
 THD_FUNCTION(Thread3, arg) {
 
   (void)arg;
diff --git a/demos/STM32/NIL-STM32F303-DISCOVERY/main.c b/demos/STM32/NIL-STM32F303-DISCOVERY/main.c
index 61d556a0c..2f1f4aa06 100644
--- a/demos/STM32/NIL-STM32F303-DISCOVERY/main.c
+++ b/demos/STM32/NIL-STM32F303-DISCOVERY/main.c
@@ -78,7 +78,7 @@ static THD_FUNCTION(Thread2, arg) {
 /*
  * Tester thread.
  */
-THD_WORKING_AREA(waThread3, 128);
+THD_WORKING_AREA(waThread3, 256);
 THD_FUNCTION(Thread3, arg) {
 
   (void)arg;
diff --git a/demos/STM32/NIL-STM32F746G-DISCOVERY/main.c b/demos/STM32/NIL-STM32F746G-DISCOVERY/main.c
index fb907fd6e..288614339 100644
--- a/demos/STM32/NIL-STM32F746G-DISCOVERY/main.c
+++ b/demos/STM32/NIL-STM32F746G-DISCOVERY/main.c
@@ -44,7 +44,7 @@ static THD_FUNCTION(Thread1, arg) {
 /*
  * Tester thread.
  */
-THD_WORKING_AREA(waThread2, 128);
+THD_WORKING_AREA(waThread2, 256);
 THD_FUNCTION(Thread2, arg) {
 
   (void)arg;