diff --git a/config.h.in b/config.h.in
index e7df8b1f1ad3c67eb2dea5c838a931aa8bd4b8cd..003d5ec0b5ba502c6c98c68e955c223ebe6b8c8f 100644
--- a/config.h.in
+++ b/config.h.in
@@ -29,6 +29,7 @@
 #undef LOG_TESTBED
 #undef EVENTSERVER
 #undef BOSSEVENTPORT
+#undef WINSUPPORT
 
 #undef HAVE_SRANDOMDEV
 
diff --git a/configure b/configure
index 96cb1b502e77b7c1b2c39b766931e8267e48482f..4ec39e60aa89c71c087c7fd62d389b24b1d311c2 100755
--- a/configure
+++ b/configure
@@ -1904,6 +1904,10 @@ else
 		  os/imagezip/ntfs/libntfs/GNUmakefile \
 		  os/imagezip/fat/GNUmakefile"
 	optional_subdirs="$optional_subdirs";
+        cat >> confdefs.h <<EOF
+#define WINSUPPORT 1
+EOF
+
 fi
 
 
@@ -1915,17 +1919,17 @@ for ac_hdr in ulxmlrpcpp/ulxr_config.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1919: checking for $ac_hdr" >&5
+echo "configure:1923: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1924 "configure"
+#line 1928 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1929: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1933: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1964,17 +1968,17 @@ for ac_hdr in linux/videodev.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1968: checking for $ac_hdr" >&5
+echo "configure:1972: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1973 "configure"
+#line 1977 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1978: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1982: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2007,7 +2011,7 @@ done
 # Extract the first word of "gtk-config", so it can be a program name with args.
 set dummy gtk-config; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2011: checking for $ac_word" >&5
+echo "configure:2015: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_GTK_CONFIG'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2086,7 +2090,7 @@ fi
 # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
 # ./install, which can be erroneously created by make from ./install.sh.
 echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
-echo "configure:2090: checking for a BSD compatible install" >&5
+echo "configure:2094: checking for a BSD compatible install" >&5
 if test -z "$INSTALL"; then
 if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2147,7 +2151,7 @@ esac
 # Extract the first word of "rsync", so it can be a program name with args.
 set dummy rsync; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2151: checking for $ac_word" >&5
+echo "configure:2155: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_RSYNC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
diff --git a/configure.in b/configure.in
index 6d749b29e8993743296697d57f1bc7479811cb0f..9fdff019c20a9c8c2ecc99959bfac2a833f91064 100755
--- a/configure.in
+++ b/configure.in
@@ -563,6 +563,7 @@ else
 		  os/imagezip/ntfs/libntfs/GNUmakefile \
 		  os/imagezip/fat/GNUmakefile"
 	optional_subdirs="$optional_subdirs";
+        AC_DEFINE_UNQUOTED(WINSUPPORT, 1)
 fi