diff --git a/src/Mod/TechDraw/Gui/MDIViewPage.cpp b/src/Mod/TechDraw/Gui/MDIViewPage.cpp
index 643062ca2f..b93d76da0f 100644
--- a/src/Mod/TechDraw/Gui/MDIViewPage.cpp
+++ b/src/Mod/TechDraw/Gui/MDIViewPage.cpp
@@ -957,8 +957,10 @@ bool MDIViewPage::compareSelections(std::vector<Gui::SelectionObject> treeSel,
     }
 
     int treeCount = 0;
+    int subCount = 0;
     int sceneCount = 0;
     int ppCount = 0;
+
     std::vector<std::string> treeNames;
     std::vector<std::string> sceneNames;
 
@@ -966,6 +968,7 @@ bool MDIViewPage::compareSelections(std::vector<Gui::SelectionObject> treeSel,
         if (tn.getObject()->isDerivedFrom(TechDraw::DrawView::getClassTypeId())) {
             std::string s = tn.getObject()->getNameInDocument();
             treeNames.push_back(s);
+            subCount += tn.getSubNames().size();
         }
     }
     std::sort(treeNames.begin(), treeNames.end());
@@ -1017,7 +1020,7 @@ bool MDIViewPage::compareSelections(std::vector<Gui::SelectionObject> treeSel,
     }
 
     //Objects all match, check subs
-    if (treeCount != ppCount) {
+    if (subCount != ppCount) {
         return false;
     }