diff --git a/src/auto/configure b/src/auto/configure
index d0c9358..a5398b1 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -4648,15 +4648,7 @@
 
   LUA_INC=
   if test "X$vi_cv_path_lua_pfx" != "X"; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if lua.h can be found in $vi_cv_path_lua_pfx/include" >&5
-$as_echo_n "checking if lua.h can be found in $vi_cv_path_lua_pfx/include... " >&6; }
-    if test -f $vi_cv_path_lua_pfx/include/lua.h; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-    else
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-            # Extract the first word of "lua", so it can be a program name with args.
+        # Extract the first word of "lua", so it can be a program name with args.
 set dummy lua; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -4696,8 +4688,8 @@
 fi
 
 
-      if test "X$vi_cv_path_lua" != "X"; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking Lua version" >&5
+    if test "X$vi_cv_path_lua" != "X"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: checking Lua version" >&5
 $as_echo_n "checking Lua version... " >&6; }
 if test "${vi_cv_version_lua+set}" = set; then :
   $as_echo_n "(cached) " >&6
@@ -4706,23 +4698,31 @@
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $vi_cv_version_lua" >&5
 $as_echo "$vi_cv_version_lua" >&6; }
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if lua.h can be found in $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua" >&5
-$as_echo_n "checking if lua.h can be found in $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua... " >&6; }
-        if test -f $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua/lua.h; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+    fi
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if lua.h can be found in $vi_cv_path_lua_pfx/include" >&5
+$as_echo_n "checking if lua.h can be found in $vi_cv_path_lua_pfx/include... " >&6; }
+    if test -f $vi_cv_path_lua_pfx/include/lua.h; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
-          LUA_INC=/lua$vi_cv_version_lua
-        else
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
-          vi_cv_path_lua_pfx=
-        fi
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking if lua.h can be found in $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua" >&5
+$as_echo_n "checking if lua.h can be found in $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua... " >&6; }
+      if test -f $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua/lua.h; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+        LUA_INC=/lua$vi_cv_version_lua
+      else
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+        vi_cv_path_lua_pfx=
       fi
     fi
   fi
 
   if test "X$vi_cv_path_lua_pfx" != "X"; then
-    if test "X$vi_cv_version_lua" != "X"; then
+    if test "X$LUA_INC" != "X"; then
             LUA_LIBS="-L${vi_cv_path_lua_pfx}/lib -llua$vi_cv_version_lua"
     else
       LUA_LIBS="-L${vi_cv_path_lua_pfx}/lib -llua"
@@ -4734,16 +4734,21 @@
     $as_echo "#define FEAT_LUA 1" >>confdefs.h
 
     if test "$enable_luainterp" = "dynamic"; then
-                  for i in 0 1 2 3 4 5 6 7 8 9; do
-	if test -f "${vi_cv_path_lua_pfx}/lib/liblua${vi_cv_version_lua}.so.$i"; then
-	  LUA_SONAME=".$i"
-	  break
-	fi
-      done
+      if test -f "${vi_cv_path_lua_pfx}/bin/cyglua-${vi_cv_version_lua}.dll"; then
+	vi_cv_dll_name_lua="cyglua-${vi_cv_version_lua}.dll"
+      else
+			for i in 0 1 2 3 4 5 6 7 8 9; do
+	  if test -f "${vi_cv_path_lua_pfx}/lib/liblua${vi_cv_version_lua}.so.$i"; then
+	    LUA_SONAME=".$i"
+	    break
+	  fi
+	done
+	vi_cv_dll_name_lua="liblua${vi_cv_version_lua}.so$LUA_SONAME"
+      fi
       $as_echo "#define DYNAMIC_LUA 1" >>confdefs.h
 
       LUA_LIBS=""
-      LUA_CFLAGS="-DDYNAMIC_LUA_DLL=\\\"liblua${vi_cv_version_lua}.so$LUA_SONAME\\\" $LUA_CFLAGS"
+      LUA_CFLAGS="-DDYNAMIC_LUA_DLL=\\\"${vi_cv_dll_name_lua}\\\" $LUA_CFLAGS"
     fi
   fi
   if test "$fail_if_missing" = "yes" -a -z "$LUA_SRC"; then
diff --git a/src/configure.in b/src/configure.in
index 5c14fc0..4b8c200 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -455,31 +455,31 @@
 
   LUA_INC=
   if test "X$vi_cv_path_lua_pfx" != "X"; then
+    dnl -- try to find Lua executable
+    AC_PATH_PROG(vi_cv_path_lua, lua)
+    if test "X$vi_cv_path_lua" != "X"; then
+      dnl -- find Lua version
+      AC_CACHE_CHECK(Lua version, vi_cv_version_lua,
+      [ vi_cv_version_lua=`${vi_cv_path_lua} -e "print(_VERSION)" | sed 's/.* //'` ])
+    fi
     AC_MSG_CHECKING(if lua.h can be found in $vi_cv_path_lua_pfx/include)
     if test -f $vi_cv_path_lua_pfx/include/lua.h; then
       AC_MSG_RESULT(yes)
     else
       AC_MSG_RESULT(no)
-      dnl -- try to find Lua executable
-      AC_PATH_PROG(vi_cv_path_lua, lua)
-      if test "X$vi_cv_path_lua" != "X"; then
-        dnl -- find Lua version
-        AC_CACHE_CHECK(Lua version, vi_cv_version_lua,
-        [ vi_cv_version_lua=`${vi_cv_path_lua} -e "print(_VERSION)" | sed 's/.* //'` ])
-        AC_MSG_CHECKING(if lua.h can be found in $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua)
-        if test -f $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua/lua.h; then
-          AC_MSG_RESULT(yes)
-          LUA_INC=/lua$vi_cv_version_lua
-        else
-          AC_MSG_RESULT(no)
-          vi_cv_path_lua_pfx=
-        fi
+      AC_MSG_CHECKING(if lua.h can be found in $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua)
+      if test -f $vi_cv_path_lua_pfx/include/lua$vi_cv_version_lua/lua.h; then
+        AC_MSG_RESULT(yes)
+        LUA_INC=/lua$vi_cv_version_lua
+      else
+        AC_MSG_RESULT(no)
+        vi_cv_path_lua_pfx=
       fi
     fi
   fi
 
   if test "X$vi_cv_path_lua_pfx" != "X"; then
-    if test "X$vi_cv_version_lua" != "X"; then
+    if test "X$LUA_INC" != "X"; then
       dnl Test alternate location using version
       LUA_LIBS="-L${vi_cv_path_lua_pfx}/lib -llua$vi_cv_version_lua"
     else
@@ -491,17 +491,22 @@
     LUA_PRO="if_lua.pro"
     AC_DEFINE(FEAT_LUA)
     if test "$enable_luainterp" = "dynamic"; then
-      dnl Determine the SONAME for the current version, but fallback to
-      dnl liblua${vi_cv_version_lua}.so if no SONAME-versioned file is found.
-      for i in 0 1 2 3 4 5 6 7 8 9; do
-	if test -f "${vi_cv_path_lua_pfx}/lib/liblua${vi_cv_version_lua}.so.$i"; then
-	  LUA_SONAME=".$i"
-	  break
-	fi
-      done
+      if test -f "${vi_cv_path_lua_pfx}/bin/cyglua-${vi_cv_version_lua}.dll"; then
+	vi_cv_dll_name_lua="cyglua-${vi_cv_version_lua}.dll"
+      else
+	dnl Determine the SONAME for the current version, but fallback to
+	dnl liblua${vi_cv_version_lua}.so if no SONAME-versioned file is found.
+	for i in 0 1 2 3 4 5 6 7 8 9; do
+	  if test -f "${vi_cv_path_lua_pfx}/lib/liblua${vi_cv_version_lua}.so.$i"; then
+	    LUA_SONAME=".$i"
+	    break
+	  fi
+	done
+	vi_cv_dll_name_lua="liblua${vi_cv_version_lua}.so$LUA_SONAME"
+      fi
       AC_DEFINE(DYNAMIC_LUA)
       LUA_LIBS=""
-      LUA_CFLAGS="-DDYNAMIC_LUA_DLL=\\\"liblua${vi_cv_version_lua}.so$LUA_SONAME\\\" $LUA_CFLAGS"
+      LUA_CFLAGS="-DDYNAMIC_LUA_DLL=\\\"${vi_cv_dll_name_lua}\\\" $LUA_CFLAGS"
     fi
   fi
   if test "$fail_if_missing" = "yes" -a -z "$LUA_SRC"; then
diff --git a/src/version.c b/src/version.c
index e8fcf2c..fff0079 100644
--- a/src/version.c
+++ b/src/version.c
@@ -720,6 +720,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    674,
+/**/
     673,
 /**/
     672,