diff --git a/arch/arm/src/a1x/Make.defs b/arch/arm/src/a1x/Make.defs
index a547ebecdc2..6db3eba59c9 100644
--- a/arch/arm/src/a1x/Make.defs
+++ b/arch/arm/src/a1x/Make.defs
@@ -24,6 +24,9 @@
 HEAD_ASRC  = arm_vectortab.S
 
 ifeq ($(CONFIG_BUILD_KERNEL),y)
+crt0$(OBJEXT): crt0.c
+	$(CC) $(CFLAGS) -c armv7-a$(DELIM)crt0.c -o crt0$(OBJEXT)
+
 STARTUP_OBJS = crt0$(OBJEXT)
 endif
 
diff --git a/arch/arm/src/am335x/Make.defs b/arch/arm/src/am335x/Make.defs
index df6f7fec44c..838cda9e682 100644
--- a/arch/arm/src/am335x/Make.defs
+++ b/arch/arm/src/am335x/Make.defs
@@ -24,6 +24,9 @@
 HEAD_ASRC  = arm_vectortab.S
 
 ifeq ($(CONFIG_BUILD_KERNEL),y)
+crt0$(OBJEXT): crt0.c
+	$(CC) $(CFLAGS) -c armv7-a$(DELIM)crt0.c -o crt0$(OBJEXT)
+
 STARTUP_OBJS = crt0$(OBJEXT)
 endif
 
diff --git a/arch/arm/src/armv7-a/crt0.c b/arch/arm/src/armv7-a/crt0.c
index a372868857d..35fe970e0ea 100644
--- a/arch/arm/src/armv7-a/crt0.c
+++ b/arch/arm/src/armv7-a/crt0.c
@@ -29,6 +29,8 @@
 
 #include <nuttx/addrenv.h>
 
+#include "svcall.h"
+
 #ifdef CONFIG_BUILD_KERNEL
 
 /****************************************************************************
diff --git a/arch/arm/src/imx6/Make.defs b/arch/arm/src/imx6/Make.defs
index bc9884e1030..aa7059cce6e 100644
--- a/arch/arm/src/imx6/Make.defs
+++ b/arch/arm/src/imx6/Make.defs
@@ -24,6 +24,9 @@
 HEAD_ASRC  = arm_vectortab.S
 
 ifeq ($(CONFIG_BUILD_KERNEL),y)
+crt0$(OBJEXT): crt0.c
+	$(CC) $(CFLAGS) -c armv7-a$(DELIM)crt0.c -o crt0$(OBJEXT)
+
 STARTUP_OBJS = crt0$(OBJEXT)
 endif
 
diff --git a/arch/arm/src/sama5/Make.defs b/arch/arm/src/sama5/Make.defs
index 99c58d348ea..6685a9817f2 100644
--- a/arch/arm/src/sama5/Make.defs
+++ b/arch/arm/src/sama5/Make.defs
@@ -24,6 +24,9 @@
 HEAD_ASRC  = arm_vectortab.S
 
 ifeq ($(CONFIG_BUILD_KERNEL),y)
+crt0$(OBJEXT): crt0.c
+	$(CC) $(CFLAGS) -c armv7-a$(DELIM)crt0.c -o crt0$(OBJEXT)
+
 STARTUP_OBJS = crt0$(OBJEXT)
 endif