diff --git a/sc/qa/unit/uicalc/uicalc.cxx b/sc/qa/unit/uicalc/uicalc.cxx
index aa5d8b5fcd02..d133876f6d04 100644
--- a/sc/qa/unit/uicalc/uicalc.cxx
+++ b/sc/qa/unit/uicalc/uicalc.cxx
@@ -1640,6 +1640,19 @@ CPPUNIT_TEST_FIXTURE(ScUiCalcTest, testTdf99913)
     CPPUNIT_ASSERT(pDoc->RowFiltered(2, 0));
 }
 
+CPPUNIT_TEST_FIXTURE(ScUiCalcTest, testTdf126540_GridToggleModifiesTheDocument)
+{
+    ScModelObj* pModelObj = createDoc("tdf99913.xlsx");
+    ScDocument* pDoc = pModelObj->GetDocument();
+    CPPUNIT_ASSERT(pDoc);
+
+    // Toggling the grid of a sheet, must set the document modified state
+    ScDocShell* pDocSh = ScDocShell::GetViewData()->GetDocShell();
+    CPPUNIT_ASSERT(!pDocSh->IsModified());
+    dispatchCommand(mxComponent, ".uno:ToggleSheetGrid", {});
+    CPPUNIT_ASSERT(pDocSh->IsModified());
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sc/source/ui/view/tabvwshf.cxx b/sc/source/ui/view/tabvwshf.cxx
index 40f78b7fc85b..57b0bf6696d1 100644
--- a/sc/source/ui/view/tabvwshf.cxx
+++ b/sc/source/ui/view/tabvwshf.cxx
@@ -735,6 +735,8 @@ void ScTabViewShell::ExecuteTable( SfxRequest& rReq )
                 rViewData.SetShowGrid(!bShowGrid);
                 SfxBindings& rBindings = GetViewFrame()->GetBindings();
                 rBindings.Invalidate( FID_TAB_TOGGLE_GRID );
+                ScDocShellModificator aModificator(*rViewData.GetDocShell());
+                aModificator.SetDocumentModified();
                 PaintGrid();
                 rReq.Done();
             }