diff --git a/os/ports/GCC/ARMCM3/STM32F103/cmparams.h b/os/ports/GCC/ARMCMx/STM32F103/cmparams.h
similarity index 100%
rename from os/ports/GCC/ARMCM3/STM32F103/cmparams.h
rename to os/ports/GCC/ARMCMx/STM32F103/cmparams.h
diff --git a/os/ports/GCC/ARMCM3/STM32F103/port.mk b/os/ports/GCC/ARMCMx/STM32F103/port.mk
similarity index 100%
rename from os/ports/GCC/ARMCM3/STM32F103/port.mk
rename to os/ports/GCC/ARMCMx/STM32F103/port.mk
diff --git a/os/ports/GCC/ARMCM3/STM32F103/vectors.s b/os/ports/GCC/ARMCMx/STM32F103/vectors.s
similarity index 100%
rename from os/ports/GCC/ARMCM3/STM32F103/vectors.s
rename to os/ports/GCC/ARMCMx/STM32F103/vectors.s
diff --git a/os/ports/GCC/ARMCM3/chcore.c b/os/ports/GCC/ARMCMx/chcore.c
similarity index 100%
rename from os/ports/GCC/ARMCM3/chcore.c
rename to os/ports/GCC/ARMCMx/chcore.c
diff --git a/os/ports/GCC/ARMCM3/chcore.h b/os/ports/GCC/ARMCMx/chcore.h
similarity index 100%
rename from os/ports/GCC/ARMCM3/chcore.h
rename to os/ports/GCC/ARMCMx/chcore.h
diff --git a/os/ports/GCC/ARMCM3/chtypes.h b/os/ports/GCC/ARMCMx/chtypes.h
similarity index 100%
rename from os/ports/GCC/ARMCM3/chtypes.h
rename to os/ports/GCC/ARMCMx/chtypes.h
diff --git a/os/ports/GCC/ARMCM3/cmsis/core_cm3.c b/os/ports/GCC/ARMCMx/cmsis/core_cm3.c
similarity index 100%
rename from os/ports/GCC/ARMCM3/cmsis/core_cm3.c
rename to os/ports/GCC/ARMCMx/cmsis/core_cm3.c
diff --git a/os/ports/GCC/ARMCM3/cmsis/core_cm3.h b/os/ports/GCC/ARMCMx/cmsis/core_cm3.h
similarity index 100%
rename from os/ports/GCC/ARMCM3/cmsis/core_cm3.h
rename to os/ports/GCC/ARMCMx/cmsis/core_cm3.h
diff --git a/os/ports/GCC/ARMCM3/crt0.s b/os/ports/GCC/ARMCMx/crt0.s
similarity index 100%
rename from os/ports/GCC/ARMCM3/crt0.s
rename to os/ports/GCC/ARMCMx/crt0.s
diff --git a/os/ports/GCC/ARMCM3/nvic.c b/os/ports/GCC/ARMCMx/nvic.c
similarity index 100%
rename from os/ports/GCC/ARMCM3/nvic.c
rename to os/ports/GCC/ARMCMx/nvic.c
diff --git a/os/ports/GCC/ARMCM3/nvic.h b/os/ports/GCC/ARMCMx/nvic.h
similarity index 100%
rename from os/ports/GCC/ARMCM3/nvic.h
rename to os/ports/GCC/ARMCMx/nvic.h
diff --git a/os/ports/GCC/ARMCM3/port.dox b/os/ports/GCC/ARMCMx/port.dox
similarity index 100%
rename from os/ports/GCC/ARMCM3/port.dox
rename to os/ports/GCC/ARMCMx/port.dox