diff --git a/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_2.x/Makefile b/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_2.x/Makefile
index 4d6cf31a..344e3bf4 100644
--- a/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_2.x/Makefile
+++ b/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_2.x/Makefile
@@ -36,7 +36,7 @@ endif
 #
 
 ARCH     = arm-none-eabi-
-SRCFLAGS = -ggdb -O0
+SRCFLAGS = -ggdb -O1
 CFLAGS   =
 CXXFLAGS = -fno-rtti
 ASFLAGS  =
diff --git a/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_3.x/Makefile b/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_3.x/Makefile
index 7f274b95..03ed9e2b 100644
--- a/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_3.x/Makefile
+++ b/boards/base/Mikromedia-Plus-STM32-M4/example_chibios_3.x/Makefile
@@ -6,7 +6,7 @@
 # Compiler options here.
 ifeq ($(USE_OPT),)
   # Replace -O0 with -O2 for a production build. -O2 just messes with the debugger.
-  USE_OPT = -O0 -g -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O1 -g -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
diff --git a/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_2.x/Makefile b/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_2.x/Makefile
index 69eb7d59..387656f6 100644
--- a/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_2.x/Makefile
+++ b/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_2.x/Makefile
@@ -35,7 +35,7 @@ endif
 #
 
 ARCH     = arm-none-eabi-
-SRCFLAGS = -ggdb -O0
+SRCFLAGS = -ggdb -O1
 CFLAGS   =
 CXXFLAGS = -fno-rtti
 ASFLAGS  =
diff --git a/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_3.x/Makefile b/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_3.x/Makefile
index a68e06e4..da6e199e 100644
--- a/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_3.x/Makefile
+++ b/boards/base/Mikromedia-STM32-M4-ILI9341/example_chibios_3.x/Makefile
@@ -36,7 +36,7 @@ endif
 #
 
 ARCH     = arm-none-eabi-
-SRCFLAGS = -ggdb -O0
+SRCFLAGS = -ggdb -O1
 CFLAGS   =
 CXXFLAGS = -fno-rtti
 ASFLAGS  =
diff --git a/boards/base/STM32F429i-Discovery/example_chibios_2.x/Makefile b/boards/base/STM32F429i-Discovery/example_chibios_2.x/Makefile
index 37dd4b5e..f5a1b2c2 100644
--- a/boards/base/STM32F429i-Discovery/example_chibios_2.x/Makefile
+++ b/boards/base/STM32F429i-Discovery/example_chibios_2.x/Makefile
@@ -34,7 +34,7 @@ endif
 #
 
 ARCH     = arm-none-eabi-
-SRCFLAGS = -ggdb -O0
+SRCFLAGS = -ggdb -O1
 CFLAGS   =
 CXXFLAGS = -fno-rtti
 ASFLAGS  =
diff --git a/boards/base/STM32F429i-Discovery/example_chibios_3.x/Makefile b/boards/base/STM32F429i-Discovery/example_chibios_3.x/Makefile
index 4a1d6a94..87eb6e61 100644
--- a/boards/base/STM32F429i-Discovery/example_chibios_3.x/Makefile
+++ b/boards/base/STM32F429i-Discovery/example_chibios_3.x/Makefile
@@ -37,7 +37,7 @@ endif
 #
 
 ARCH     = arm-none-eabi-
-SRCFLAGS = -ggdb -O0
+SRCFLAGS = -ggdb -O1
 CFLAGS   =
 CXXFLAGS = -fno-rtti
 ASFLAGS  =