diff --git a/src/Mod/Spreadsheet/Gui/Command.cpp b/src/Mod/Spreadsheet/Gui/Command.cpp
index 4d3d8df5c7..3e9ed3a5d4 100644
--- a/src/Mod/Spreadsheet/Gui/Command.cpp
+++ b/src/Mod/Spreadsheet/Gui/Command.cpp
@@ -105,9 +105,11 @@ bool CmdSpreadsheetMergeCells::isActive()
 {
     if (getActiveGuiDocument()) {
         Gui::MDIView* activeWindow = Gui::getMainWindow()->activeWindow();
-        if (activeWindow && freecad_dynamic_cast<SpreadsheetGui::SheetView>(activeWindow))
-            return true;
+        SpreadsheetGui::SheetView * sheetView = freecad_dynamic_cast<SpreadsheetGui::SheetView>(activeWindow);
 
+        if (sheetView) {
+            return (sheetView->selectedIndexesRaw().size() > 1);
+        }
     }
     return false;
 }
diff --git a/src/Mod/Spreadsheet/Gui/SheetTableView.cpp b/src/Mod/Spreadsheet/Gui/SheetTableView.cpp
index 6dfa5d1b04..19ebd9b640 100644
--- a/src/Mod/Spreadsheet/Gui/SheetTableView.cpp
+++ b/src/Mod/Spreadsheet/Gui/SheetTableView.cpp
@@ -973,7 +973,7 @@ void SheetTableView::contextMenuEvent(QContextMenuEvent *)
         actionDel->setEnabled(true);
         actionSplit->setEnabled(selectedIndexes().size() == 1 &&
             sheet->isMergedCell(CellAddress(currentIndex().row(),currentIndex().column())));
-        actionMerge->setEnabled(true);
+        actionMerge->setEnabled(selectedIndexes().size() > 1);
     }
 
     auto ranges = selectedRanges();