diff --git a/simgear/props/props.cxx b/simgear/props/props.cxx
index 44047422..deb1f22b 100644
--- a/simgear/props/props.cxx
+++ b/simgear/props/props.cxx
@@ -30,8 +30,8 @@ SG_USING_STD(sort);
 SG_USING_STD(find);
 SG_USING_STD(vector);
 
-#ifdef _MSC_VER
-// MSVC is buggy, and needs something strange here
+#if ( _MSC_VER == 1200 )
+! // MSVC 6 is buggy, and needs something strange here
 SG_USING_STD(vector<SGPropertyNode_ptr>);
 SG_USING_STD(vector<SGPropertyChangeListener *>);
 SG_USING_STD(vector<SGPropertyNode *>);