diff --git a/TODO b/TODO
index 6e5b045275..5ff1cabccd 100644
--- a/TODO
+++ b/TODO
@@ -21,7 +21,7 @@ NuttX TODO List (Last updated January 6, 2008)
   (2)  ARM/LPC214x (arch/arm/src/lpc214x/)
   (4)  pjrc-8052 / MCS51 (arch/pjrc-8051/)
   (2)  z80 (arch/z80/)
-  (2)  z16 (arch/z16/)
+  (1)  z16 (arch/z16/)
 
 o Task/Scheduler (sched/)
   ^^^^^^^^^^^^^^^^^^^^^^^
@@ -363,13 +363,3 @@ o z16 (arch/z16)
   Status:      Open
   Priority:    Low, thought to be cosmetic.  I think this is a consequence of
                replacing vs. inserting the library.
-
-  Description: When printf is used, there are warnings like:
-
-               WARNING (255) Missing declaration of (s)printf helper function, variable, or field
-               Declaration of __print_out is missing
-
-               Need to suppress built-in printf logic to use NuttX printf logic.
-  Status:      Open
-  Priority:    Undetermined
-
diff --git a/configs/z16f2800100zcog/ostest/Make.defs b/configs/z16f2800100zcog/ostest/Make.defs
index 542a1f7212..3318ee3403 100644
--- a/configs/z16f2800100zcog/ostest/Make.defs
+++ b/configs/z16f2800100zcog/ostest/Make.defs
@@ -79,9 +79,9 @@ else
   ARCHOPTIMIZATION	= -nodebug -regvar
 endif
 
-ARCHCPUFLAGS		= -chartype:S -model:L -NOmodsect -cpu:Z16F2811AL \
+ARCHCPUFLAGS		= -chartype:S -model:L -NOmodsect -cpu:Z16F2811AL -NOgenprint \
 			  -asmsw:" $(ARCHASMCPUFLAGS) $(ARCHASMINCLUDES) $(ARCHASMWARNINGS) $(ARCHASMOPTIMIZATION)"
-ARCHLIST		= -NOgenprint -keeplst -NOlist -NOlistinc -NOkeepasm
+ARCHLIST		= -keeplst -NOlist -NOlistinc -NOkeepasm
 ARCHPICFLAGS		=
 ARCHWARNINGS		= -warn
 ARCHDEFINES		= -define:_Z16F2811AL -define:_Z16K_SERIES \
@@ -89,7 +89,7 @@ ARCHDEFINES		= -define:_Z16F2811AL -define:_Z16K_SERIES \
 ARCHSTDINCLUDES 	= -stdinc:'$(WTOPDIR)\include;$(WZDSSTDINCDIR);$(WZDSZILOGINCDIR)'
 ARCHUSRINCLUDES 	= -usrinc:'.'
 ARCHINCLUDES		= $(ARCHSTDINCLUDES) $(ARCHUSRINCLUDES)
-CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHLIST) \
 			  $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES)
 
 CPPDEFINES              = -D_Z16F2811AL -D_Z16K_SERIES -D_Z16F_SERIES -D__ASSEMBLY__