diff --git a/packages/dx-grid-core/src/plugins/sorting-state/helpers.test.ts b/packages/dx-grid-core/src/plugins/sorting-state/helpers.test.ts
index 9977cf0662..124efc7d3d 100644
--- a/packages/dx-grid-core/src/plugins/sorting-state/helpers.test.ts
+++ b/packages/dx-grid-core/src/plugins/sorting-state/helpers.test.ts
@@ -38,6 +38,20 @@ describe('SortingState helpers', () => {
       const result = getPersistentSortedColumns(sorting, columnExtensions);
       expect(result).toEqual(['b']);
     });
+    it('should honor the default sortingEnabled state', () => {
+      const sorting = [
+        { columnName: 'a', ...defaultDirection },
+        { columnName: 'b', ...defaultDirection },
+        { columnName: 'c', ...defaultDirection },
+      ];
+      const columnExtensions = [
+        { columnName: 'a', sortingEnabled: true },
+        { columnName: 'b', sortingEnabled: false },
+        { columnName: 'c' },
+      ];
+      const result = getPersistentSortedColumns(sorting, columnExtensions);
+      expect(result).toEqual(['b']);
+    });
   });
 
   describe('#calculateKeepOther', () => {
diff --git a/packages/dx-grid-core/src/plugins/sorting-state/helpers.ts b/packages/dx-grid-core/src/plugins/sorting-state/helpers.ts
index 3a53d4acc5..1289f0b3c5 100644
--- a/packages/dx-grid-core/src/plugins/sorting-state/helpers.ts
+++ b/packages/dx-grid-core/src/plugins/sorting-state/helpers.ts
@@ -15,7 +15,7 @@ export const getColumnSortingDirection: GetColumnSortingDirectionFn = (
 export const getPersistentSortedColumns: GetPersistentSortedColumnsFn = (
   sorting, columnExtensions = [],
 ) => columnExtensions.reduce((acc, { columnName, sortingEnabled }) => {
-  if (!sortingEnabled) {
+  if (sortingEnabled === false) {
     if (sorting.findIndex(sortItem => sortItem.columnName === columnName) > -1) {
       acc.push(columnName);
     }
diff --git a/packages/dx-grid-core/tslint.json b/packages/dx-grid-core/tslint.json
new file mode 100644
index 0000000000..45f860a597
--- /dev/null
+++ b/packages/dx-grid-core/tslint.json
@@ -0,0 +1,13 @@
+{
+  "extends": "../../tslint.json",
+  "linterOptions": {
+    "exclude": [
+      "config/**/*.js",
+      "node_modules/**/*.ts",
+      "**/*.g.test.tsx"
+    ]
+  },
+  "rules": {
+		"no-boolean-literal-compare": false
+	}
+}
diff --git a/packages/dx-scheduler-core/tslint.json b/packages/dx-scheduler-core/tslint.json
new file mode 100644
index 0000000000..45f860a597
--- /dev/null
+++ b/packages/dx-scheduler-core/tslint.json
@@ -0,0 +1,13 @@
+{
+  "extends": "../../tslint.json",
+  "linterOptions": {
+    "exclude": [
+      "config/**/*.js",
+      "node_modules/**/*.ts",
+      "**/*.g.test.tsx"
+    ]
+  },
+  "rules": {
+		"no-boolean-literal-compare": false
+	}
+}