diff --git a/src/GvimExt/Make_ming.mak b/src/GvimExt/Make_ming.mak
index 2976ea0..a6ab3ae 100644
--- a/src/GvimExt/Make_ming.mak
+++ b/src/GvimExt/Make_ming.mak
@@ -43,6 +43,10 @@
 DEL = del
 endif
 endif
+# Set the default $(WINVER) to make it work with WinXP.
+ifndef WINVER
+WINVER = 0x0501
+endif
 CXX := $(CROSS_COMPILE)g++
 WINDRES := $(CROSS_COMPILE)windres
 WINDRES_CXX = $(CXX)
@@ -68,7 +72,7 @@
 			$(LIBS)
 
 gvimext.o: gvimext.cpp
-	$(CXX) $(CXXFLAGS) -DFEAT_GETTEXT -c $? -o $@
+	$(CXX) $(CXXFLAGS) -DFEAT_GETTEXT -DWINVER=$(WINVER) -D_WIN32_WINNT=$(WINVER) -c $? -o $@
 
 $(RES): gvimext_ming.rc
 	$(WINDRES) $(WINDRES_FLAGS) --input-format=rc --output-format=coff -DMING $? -o $@
diff --git a/src/version.c b/src/version.c
index 40690ec..c4012e2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1508,
+/**/
     1507,
 /**/
     1506,