diff --git a/os/ports/GCC/ARMCMx/LPC11xx/port.mk b/os/ports/GCC/ARMCMx/LPC11xx/port.mk
index 886add45d..a38729958 100644
--- a/os/ports/GCC/ARMCMx/LPC11xx/port.mk
+++ b/os/ports/GCC/ARMCMx/LPC11xx/port.mk
@@ -1,10 +1,11 @@
 # List of the ChibiOS/RT Cortex-M0 LPC11xx port files.
-PORTSRC = $(CHIBIOS)/os/ports/GCC/ARMCMx/LPC11xx/vectors.c \
+PORTSRC = $(CHIBIOS)/os/ports/GCC/ARMCMx/crt0.c \
+          $(CHIBIOS)/os/ports/GCC/ARMCMx/LPC11xx/vectors.c \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/chcore.c \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/chcore_v6m.c \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/nvic.c
 
-PORTASM = ${CHIBIOS}/os/ports/GCC/ARMCMx/crt0_v6m.s
+PORTASM =
 
 PORTINC = ${CHIBIOS}/os/ports/GCC/ARMCMx \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/LPC11xx
diff --git a/os/ports/GCC/ARMCMx/LPC13xx/port.mk b/os/ports/GCC/ARMCMx/LPC13xx/port.mk
index 3ab940082..d87487e54 100644
--- a/os/ports/GCC/ARMCMx/LPC13xx/port.mk
+++ b/os/ports/GCC/ARMCMx/LPC13xx/port.mk
@@ -1,10 +1,11 @@
 # List of the ChibiOS/RT Cortex-M0 LPC13xx port files.
-PORTSRC = $(CHIBIOS)/os/ports/GCC/ARMCMx/LPC13xx/vectors.c \
+PORTSRC = $(CHIBIOS)/os/ports/GCC/ARMCMx/crt0.c \
+          $(CHIBIOS)/os/ports/GCC/ARMCMx/LPC13xx/vectors.c \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/chcore.c \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/chcore_v7m.c \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/nvic.c
 
-PORTASM = ${CHIBIOS}/os/ports/GCC/ARMCMx/crt0_v7m.s
+PORTASM =
 
 PORTINC = ${CHIBIOS}/os/ports/GCC/ARMCMx \
           ${CHIBIOS}/os/ports/GCC/ARMCMx/LPC13xx