diff --git a/common/UpdateType.cc b/common/UpdateType.cc
index a8ba358e96f1b153002c25a5a671e203bfb2a8d9..8a75ebc374d6a1c8329e3564df1e3f792f766c6e 100644
--- a/common/UpdateType.cc
+++ b/common/UpdateType.cc
@@ -39,6 +39,12 @@
 *                                                                            *
 \*===========================================================================*/
 
+// Workaround compiler bug in VS2017 and earlier with colliding Qt operators and bitset
+#ifdef _MSC_VER
+  #if (_MSC_VER <= 1916)
+    #define  QT_NO_FLOAT16_OPERATORS
+  #endif
+#endif
 
 #include "TypesInternal.hh"
 #include "UpdateType.hh"
diff --git a/common/UpdateType.hh b/common/UpdateType.hh
index acad7ae08df85cc16fdd2e53293b355169fba41c..626f7b577982f7adad018ddb75a147c3a8bb8f24 100644
--- a/common/UpdateType.hh
+++ b/common/UpdateType.hh
@@ -84,7 +84,7 @@ class DLLEXPORT UpdateType {
         return os << type.type_;
     }
 
-  protected:
+  private:
     UpdateTypeSet type_;
 };