diff --git a/build/bakefiles/zlib.bkl b/build/bakefiles/zlib.bkl
index feb2222993..73850d936a 100644
--- a/build/bakefiles/zlib.bkl
+++ b/build/bakefiles/zlib.bkl
@@ -17,7 +17,9 @@
     <lib id="wxzlib" template="3rdparty_lib"
          cond="wxUSE_ZLIB=='builtin' and BUILDING_LIB=='1'">
         <dirname>$(LIBDIRNAME)</dirname>
-        <cflags-borland>-w-8004 -w-8012 -w-8057</cflags-borland> 
+        <cflags-borland>
+            -w-8004 -w-8008 -w-8012 -w-8057 -w-8066
+        </cflags-borland> 
         <if cond="FORMAT=='msevc4prj'">
             <define>NO_ERRNO_H</define>
         </if>
diff --git a/build/msw/makefile.bcc b/build/msw/makefile.bcc
index d0cd960051..e7d92f78ce 100644
--- a/build/msw/makefile.bcc
+++ b/build/msw/makefile.bcc
@@ -44,7 +44,8 @@ WXREGEX_OBJECTS =  \
 	$(OBJS)\wxregex_regerror.obj \
 	$(OBJS)\wxregex_regfree.obj
 WXZLIB_CFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
-	$(__OPTIMIZEFLAG) -tWM -w-8004 -w-8012 -w-8057 $(CPPFLAGS) $(CFLAGS)
+	$(__OPTIMIZEFLAG) -tWM -w-8004 -w-8008 -w-8012 -w-8057 -w-8066 $(CPPFLAGS) \
+	$(CFLAGS)
 WXZLIB_OBJECTS =  \
 	$(OBJS)\wxzlib_adler32.obj \
 	$(OBJS)\wxzlib_compress.obj \