diff --git a/wscript b/wscript
index c876a7d2c5..7b8582b4b2 100644
--- a/wscript
+++ b/wscript
@@ -558,8 +558,8 @@ def configure(conf):
     if opts.vst:
         conf.define('VST_SUPPORT', 1)
         conf.env['VST_SUPPORT'] = True
-        conf.env.append_value('CFLAGS', Options.options.wine_include)
-        conf.env.append_value('CXXFLAGS', Options.options.wine_include)
+        conf.env.append_value('CFLAGS', '-I' + Options.options.wine_include)
+        conf.env.append_value('CXXFLAGS', '-I' + Options.options.wine_include)
         autowaf.check_header(conf, 'cxx', 'windows.h', mandatory = True)
     if opts.lxvst:
         conf.define('LXVST_SUPPORT', 1)