diff --git a/arch/z16/src/common/z16_puts.c b/arch/z16/src/common/z16_puts.c
new file mode 100644
index 0000000000..26e14f5bb9
--- /dev/null
+++ b/arch/z16/src/common/z16_puts.c
@@ -0,0 +1,46 @@
+/****************************************************************************
+ * arch/z16/src/common/z16_puts.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/arch.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_puts
+ *
+ * Description:
+ *   This is a low-level helper function used to support debug.
+ *
+ ****************************************************************************/
+
+void up_puts(const char *str)
+{
+  while (*str)
+    {
+      up_putc(*str++);
+    }
+}
diff --git a/arch/z16/src/z16f/Make.defs b/arch/z16/src/z16f/Make.defs
index 793611d913..ab3b7713dc 100644
--- a/arch/z16/src/z16f/Make.defs
+++ b/arch/z16/src/z16f/Make.defs
@@ -26,7 +26,7 @@ CMN_CSRCS += z16_interruptcontext.c z16_stackdump.c z16_copystate.c
 CMN_CSRCS += z16_mdelay.c z16_udelay.c z16_createstack.c z16_registerdump.c
 CMN_CSRCS += z16_unblocktask.c z16_doirq.c z16_releasepending.c z16_usestack.c
 CMN_CSRCS += z16_exit.c z16_releasestack.c z16_stackframe.c z16_idle.c
-CMN_CSRCS += z16_reprioritizertr.c
+CMN_CSRCS += z16_reprioritizertr.c z16_puts.c
 
 CHIP_SSRCS = z16f_lowuart.S z16f_saveusercontext.S z16f_restoreusercontext.S
 CHIP_CSRCS = z16f_clkinit.c z16f_sysexec.c z16f_irq.c z16f_serial.c