diff --git a/arch/z16/src/z16f/z16f_irq.c b/arch/z16/src/z16f/z16f_irq.c
index 01e21229f8..5a214e6d6c 100644
--- a/arch/z16/src/z16f/z16f_irq.c
+++ b/arch/z16/src/z16f/z16f_irq.c
@@ -43,7 +43,6 @@
 
 #include <nuttx/irq.h>
 #include <arch/irq.h>
-#include <ez8.h>
 
 #include "chip/chip.h"
 #include "os_internal.h"
diff --git a/configs/z16f2800100zcog/ostest/defconfig b/configs/z16f2800100zcog/ostest/defconfig
index 8ef26c9383..60cb0cc7bc 100644
--- a/configs/z16f2800100zcog/ostest/defconfig
+++ b/configs/z16f2800100zcog/ostest/defconfig
@@ -144,8 +144,7 @@ CONFIG_EXAMPLE=ostest
 CONFIG_DEBUG=y
 CONFIG_DEBUG_VERBOSE=n
 CONFIG_MM_REGIONS=1
-CONFIG_ARCH_LOWPUTC=n
-CONFIG_ARCH_LOWGETC=n
+CONFIG_ARCH_LOWPUTC=y
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_INSTRUMENTATION=n
 CONFIG_TASK_NAME_SIZE=0
diff --git a/configs/z16f2800100zcog/pashello/defconfig b/configs/z16f2800100zcog/pashello/defconfig
index ef17f42067..0569a311d6 100644
--- a/configs/z16f2800100zcog/pashello/defconfig
+++ b/configs/z16f2800100zcog/pashello/defconfig
@@ -144,8 +144,7 @@ CONFIG_EXAMPLE=pashello
 CONFIG_DEBUG=y
 CONFIG_DEBUG_VERBOSE=n
 CONFIG_MM_REGIONS=1
-CONFIG_ARCH_LOWPUTC=n
-CONFIG_ARCH_LOWGETC=n
+CONFIG_ARCH_LOWPUTC=y
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_INSTRUMENTATION=n
 CONFIG_TASK_NAME_SIZE=0
diff --git a/configs/z8encore000zco/ostest/defconfig b/configs/z8encore000zco/ostest/defconfig
index 0b4a31f24c..c5b5b94059 100644
--- a/configs/z8encore000zco/ostest/defconfig
+++ b/configs/z8encore000zco/ostest/defconfig
@@ -144,8 +144,7 @@ CONFIG_EXAMPLE=ostest
 CONFIG_DEBUG=y
 CONFIG_DEBUG_VERBOSE=n
 CONFIG_MM_REGIONS=1
-CONFIG_ARCH_LOWPUTC=n
-CONFIG_ARCH_LOWGETC=n
+CONFIG_ARCH_LOWPUTC=y
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_INSTRUMENTATION=n
 CONFIG_TASK_NAME_SIZE=0
diff --git a/include/nuttx/compiler.h b/include/nuttx/compiler.h
index f0235ed1db..e8d14f7fd3 100644
--- a/include/nuttx/compiler.h
+++ b/include/nuttx/compiler.h
@@ -239,7 +239,7 @@
 # undef CONFIG_CPP_HAVE_VARARGS /* No variable argument macros */
 # undef CONFIG_CPP_HAVE_WARNING /* Does not support #warning */
 
-/* Intriniscs */
+/* Intrinsics */
 
 # define CONFIG_HAVE_FUNCTIONNAME 1 /* Has __FUNCTION__ */
 # define CONFIG_HAVE_FILENAME     1 /* Has __FILE__ */