diff --git a/qse/configure b/qse/configure
index fffa38c7..8461e849 100755
--- a/qse/configure
+++ b/qse/configure
@@ -17507,14 +17507,6 @@ fi
 done
 
 
-ac_fn_c_check_type "$LINENO" "wchar_t" "ac_cv_type_wchar_t" "#include <stddef.h>
-"
-if test "x$ac_cv_type_wchar_t" = xyes; then :
-
-$as_echo "#define HAVE_WCHAR_T_IN_STDDEF_H /**/" >>confdefs.h
-
-fi
-
 
 for ac_func in uselocale
 do :
@@ -19879,7 +19871,7 @@ _ACEOF
 
 
 
-if test "${platform_win32}" == "yes"
+if test "${platform_win32}" = "yes"
 then
 	# The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
@@ -20866,6 +20858,7 @@ else
 fi
 
 test "${ac_cv_sizeof_wchar_t}" = "0" && enable_wchar_is=no
+test "${ac_cv_sizeof_wchar_t}" = "1" && enable_wchar_is=no
 if test "${enable_wchar_is}" = "yes"
 then
 
diff --git a/qse/configure.ac b/qse/configure.ac
index a2058a60..fe293622 100644
--- a/qse/configure.ac
+++ b/qse/configure.ac
@@ -131,11 +131,11 @@ AC_CHECK_HEADERS([sys/stropts.h sys/macstat.h linux/ethtool.h linux/sockios.h])
 AC_CHECK_HEADERS([quadmath.h crt_externs.h sys/prctl.h uci.h])
 
 dnl check data types
-AC_CHECK_TYPE([wchar_t], 
-	[ AC_DEFINE([HAVE_WCHAR_T_IN_STDDEF_H],
-	           [],[wchar_t is available in stddef.h]) ],
-	[],
-	[#include <stddef.h>])
+dnl AC_CHECK_TYPE([wchar_t], 
+dnl 	[ AC_DEFINE([HAVE_WCHAR_T_IN_STDDEF_H],
+dnl	           [],[wchar_t is available in stddef.h]) ],
+dnl	[],
+dnl	[#include <stddef.h>])
 
 dnl check functions
 AC_CHECK_FUNCS([uselocale])
@@ -375,7 +375,7 @@ AC_CHECK_SIZEOF(off64_t)
 AC_CHECK_SIZEOF(mbstate_t,,[#include <wchar.h>])
 AX_CHECK_NUMVALOF(MB_LEN_MAX,[32],[#include <limits.h>])
 
-if test "${platform_win32}" == "yes"
+if test "${platform_win32}" = "yes"
 then
 	AC_CHECK_SIZEOF(struct sockaddr_in,,[
 		#include <winsock2.h>
@@ -581,6 +581,7 @@ dnl define extra options
 AC_ARG_ENABLE([wchar], [AS_HELP_STRING([--enable-wchar],[Use the wide character type as the default charater type when enabled (default. yes)])],
 	enable_wchar_is=$enableval,enable_wchar_is=yes)
 test "${ac_cv_sizeof_wchar_t}" = "0" && enable_wchar_is=no
+test "${ac_cv_sizeof_wchar_t}" = "1" && enable_wchar_is=no
 if test "${enable_wchar_is}" = "yes"
 then
 	AC_DEFINE([QSE_CHAR_IS_WCHAR],[],[The default character type is the wide character type])
diff --git a/qse/doc/page/installation.md b/qse/doc/page/installation.md
index ffabb3a5..63a3ef32 100644
--- a/qse/doc/page/installation.md
+++ b/qse/doc/page/installation.md
@@ -156,6 +156,16 @@ available for the native makefile for Watcom C/C++ for OS/2 only.
 
     wmake TCPV40HDRS=on
 
+### SCO UNIX System V/386 Release 3.2 ###
+
+- Specify GREP if configure fails to find an acceptable grep.
+- Build in the source tree. Building outside the source tree is likely to fail
+  for dificiency of the bundled make utility.
+- Do not include -g in CFLAGS. 
+
+    ./configure GREP=/bin/grep CFLAGS=""
+
+
 ### More options ###
 
 More options are available for the configure script. Execute this for more 
diff --git a/qse/include/qse/config.h.in b/qse/include/qse/config.h.in
index 25da7e56..ffbd06a1 100644
--- a/qse/include/qse/config.h.in
+++ b/qse/include/qse/config.h.in
@@ -700,9 +700,6 @@
 /* Define to 1 if you have the <wchar.h> header file. */
 #undef HAVE_WCHAR_H
 
-/* wchar_t is available in stddef.h */
-#undef HAVE_WCHAR_T_IN_STDDEF_H
-
 /* Define to 1 if you have the `wcrtomb' function. */
 #undef HAVE_WCRTOMB