diff --git a/Contrib/VPatch/Source/Plugin/SConscript b/Contrib/VPatch/Source/Plugin/SConscript
index 007fe0e1..177a899a 100644
--- a/Contrib/VPatch/Source/Plugin/SConscript
+++ b/Contrib/VPatch/Source/Plugin/SConscript
@@ -13,4 +13,4 @@ libs = Split("""
 
 Import('BuildPlugin env')
 
-BuildPlugin(target, files, libs)
+BuildPlugin(target, files, libs, defines = ['DLL_CHECKSUMS'])