diff --git a/arch/z80/src/common/up_internal.h b/arch/z80/src/common/up_internal.h
index 5eefa5069a..cc8c1593db 100644
--- a/arch/z80/src/common/up_internal.h
+++ b/arch/z80/src/common/up_internal.h
@@ -50,8 +50,6 @@
 #undef  CONFIG_SUPPRESS_SERIAL_INTS   /* Console will poll */
 #undef  CONFIG_SUPPRESS_UART_CONFIG   /* Do not reconfig UART */
 #undef  CONFIG_DUMP_ON_EXIT           /* Dump task state on exit */
-#undef  CONFIG_Z80_LOWPUTC            /* Support up_lowputc for debug */
-#undef  CONFIG_Z80_LOWGETC            /* support up_lowgetc for debug */
 
 /****************************************************************************
  * Included Files
@@ -67,8 +65,7 @@
 
  /* Determine which (if any) console driver to use */
 
-#if defined(CONFIG_Z80_LOWPUTC) || defined(CONFIG_Z80_LOWGETC) || \
-    CONFIG_NFILE_DESCRIPTORS == 0 || defined(CONFIG_DEV_LOWCONSOLE)
+#if CONFIG_NFILE_DESCRIPTORS == 0 || defined(CONFIG_DEV_LOWCONSOLE)
 #  define CONFIG_USE_LOWCONSOLE 1
 #  define CONFIG_USE_LOWUARTINIT 1
 #elif defined(CONFIG_DEV_CONSOLE) && CONFIG_NFILE_DESCRIPTORS > 0