diff --git a/demos/STM32/RT-STM32L552ZE-NUCLEO144/Makefile b/demos/STM32/RT-STM32L552ZE-NUCLEO144/Makefile
index d3e5d7224..35c743b48 100644
--- a/demos/STM32/RT-STM32L552ZE-NUCLEO144/Makefile
+++ b/demos/STM32/RT-STM32L552ZE-NUCLEO144/Makefile
@@ -5,7 +5,7 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
diff --git a/demos/STM32/RT-STM32L552ZE-NUCLEO144/debug/RT-STM32L552ZE-NUCLEO144 (ST-Link GDB Server, Flash and Run).launch b/demos/STM32/RT-STM32L552ZE-NUCLEO144/debug/RT-STM32L552ZE-NUCLEO144 (ST-Link GDB Server, Flash and Run).launch
index 878dc812c..cc4556fae 100644
--- a/demos/STM32/RT-STM32L552ZE-NUCLEO144/debug/RT-STM32L552ZE-NUCLEO144 (ST-Link GDB Server, Flash and Run).launch	
+++ b/demos/STM32/RT-STM32L552ZE-NUCLEO144/debug/RT-STM32L552ZE-NUCLEO144 (ST-Link GDB Server, Flash and Run).launch	
@@ -49,4 +49,6 @@
 <listAttribute key="org.eclipse.debug.ui.favoriteGroups">
 <listEntry value="org.eclipse.debug.ui.launchGroup.debug"/>
 </listAttribute>
+<stringAttribute key="org.eclipse.dsf.launch.MEMORY_BLOCKS" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;no&quot;?&gt;&#10;&lt;memoryBlockExpressionList context=&quot;reserved-for-future-use&quot;/&gt;&#10;"/>
+<stringAttribute key="process_factory_id" value="org.eclipse.cdt.dsf.gdb.GdbProcessFactory"/>
 </launchConfiguration>