diff --git a/Contrib/BgImage/SConscript b/Contrib/BgImage/SConscript
index b8974352..cc665ab8 100644
--- a/Contrib/BgImage/SConscript
+++ b/Contrib/BgImage/SConscript
@@ -21,4 +21,4 @@ docs = Split("""
 
 Import('BuildPlugin')
 
-BuildPlugin(target, files, libs, examples, docs)
+BuildPlugin(target, files, libs, examples, docs, cppused = True)
diff --git a/Contrib/InstallOptions/SConscript b/Contrib/InstallOptions/SConscript
index a3d4aaaf..5bc303a8 100644
--- a/Contrib/InstallOptions/SConscript
+++ b/Contrib/InstallOptions/SConscript
@@ -41,6 +41,6 @@ Import('BuildPlugin env PerformPluginExtrasDistOperationOnce')
 
 unicodetarget = 'UNICODE' in env['CPPDEFINES']
 
-BuildPlugin(target, files, libs, examples, docs, res = resources)
+BuildPlugin(target, files, libs, examples, docs, res = resources, cppused = True)
 if PerformPluginExtrasDistOperationOnce(env, unicodetarget):
 	env.DistributeInclude(includes)