diff --git a/src/data/adHocFilter.test.ts b/src/data/adHocFilter.test.ts
index b78de82b..367804ef 100644
--- a/src/data/adHocFilter.test.ts
+++ b/src/data/adHocFilter.test.ts
@@ -163,6 +163,17 @@ describe('AdHocManager', () => {
     );
   });
 
+  it('apply ad hoc filter IN operator without parentheses', () => {
+    const ahm = new AdHocFilter();
+    ahm.setTargetTableFromQuery('SELECT * FROM foo');
+    const val = ahm.apply('SELECT stuff FROM foo WHERE col = test', [
+      { key: 'key', operator: 'IN', value: '\'val1\', \'val2\'' },
+    ] as AdHocVariableFilter[]);
+    expect(val).toEqual(
+        `SELECT stuff FROM foo WHERE col = test settings additional_table_filters={'foo' : ' key IN (\\'val1\\', \\'val2\\') '}`
+    );
+  });
+
   it('apply ad hoc filter IN operator with integer values', () => {
     const ahm = new AdHocFilter();
     ahm.setTargetTableFromQuery('SELECT * FROM foo');
diff --git a/src/data/adHocFilter.ts b/src/data/adHocFilter.ts
index 58457824..eadb8927 100644
--- a/src/data/adHocFilter.ts
+++ b/src/data/adHocFilter.ts
@@ -60,10 +60,15 @@ function isValid(filter: AdHocVariableFilter): boolean {
 
 function escapeValueBasedOnOperator(s: string, operator: AdHocVariableFilterOperator): string {
   if (operator === 'IN') {
-    return `${s}`.replace(/'/g, "\\'");
-  }
+    // Allow list of values without parentheses
+    if (s.length > 2 && s[0] !== '(' && s[s.length - 1] !== ')') {
+      s = `(${s})`
+    }
 
-  return `\\'${s}\\'`;
+    return s.replace(/'/g, "\\'");
+  } else {
+    return `\\'${s}\\'`;
+  }
 }
 
 function convertOperatorToClickHouseOperator(operator: AdHocVariableFilterOperator): string {