diff --git a/configure b/configure
index 2c20ae7d22..4ed11022ad 100755
--- a/configure
+++ b/configure
@@ -13164,7 +13164,7 @@ fi
 if test "$wxUSE_MAC" = 1 ; then
   TOOLKIT_DEF="${TOOLKIT_DEF} -D__UNIX__ -D__POWERPC__ -DTARGET_CARBON"
   CFLAGS="${CFLAGS} -fno-common -fpascal-strings"
-  CPPFLAGS="${CPPFLAGS} -fno-common -fpascal-strings"
+  CPPFLAGS="${CPPFLAGS} -cpp-precomp -fno-common -fpascal-strings"
   # Extract the first word of "Rez", so it can be a program name with args.
 set dummy Rez; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
diff --git a/configure.in b/configure.in
index 13cf15da31..3e754bada3 100644
--- a/configure.in
+++ b/configure.in
@@ -2971,7 +2971,7 @@ fi
 if test "$wxUSE_MAC" = 1 ; then
   TOOLKIT_DEF="${TOOLKIT_DEF} -D__UNIX__ -D__POWERPC__ -DTARGET_CARBON"
   CFLAGS="${CFLAGS} -fno-common -fpascal-strings"
-  CPPFLAGS="${CPPFLAGS} -fno-common -fpascal-strings"
+  CPPFLAGS="${CPPFLAGS} -cpp-precomp -fno-common -fpascal-strings"
   AC_CHECK_PROG(REZ, Rez, Rez, /Developer/Tools/Rez)
   AC_CHECK_PROG(DEREZ, Derez, Derez, /Developer/Tools/Derez)
   RESCOMP=${REZ}