diff --git a/package-lock.json b/package-lock.json
index 2c239ffd0..fe701219e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "trilium",
-  "version": "0.54.2",
+  "version": "0.54.3",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "trilium",
-      "version": "0.54.2",
+      "version": "0.54.3",
       "hasInstallScript": true,
       "license": "AGPL-3.0-only",
       "dependencies": {
diff --git a/spec/search/parser.spec.js b/spec/search/parser.spec.js
index 05df9ef40..6eadd2ec1 100644
--- a/spec/search/parser.spec.js
+++ b/spec/search/parser.spec.js
@@ -211,6 +211,35 @@ describe("Parser", () => {
         expect(secondSubSub.constructor.name).toEqual("LabelComparisonExp");
         expect(secondSubSub.attributeName).toEqual("third");
     });
+
+    it("label sub-expression without explicit operator", () => {
+        const rootExp = parse({
+            fulltextTokens: [],
+            expressionTokens: tokens(["#first", ["#second", "or", "#third"], "#fourth"]),
+            searchContext: new SearchContext()
+        });
+
+        expect(rootExp.constructor.name).toEqual("AndExp");
+        assertIsArchived(rootExp.subExpressions[0]);
+
+        expect(rootExp.subExpressions[1].constructor.name).toEqual("AndExp");
+        const [firstSub, secondSub, thirdSub] = rootExp.subExpressions[1].subExpressions;
+
+        expect(firstSub.constructor.name).toEqual("AttributeExistsExp");
+        expect(firstSub.attributeName).toEqual("first");
+
+        expect(secondSub.constructor.name).toEqual("OrExp");
+        const [firstSubSub, secondSubSub] = secondSub.subExpressions;
+
+        expect(firstSubSub.constructor.name).toEqual("AttributeExistsExp");
+        expect(firstSubSub.attributeName).toEqual("second");
+
+        expect(secondSubSub.constructor.name).toEqual("AttributeExistsExp");
+        expect(secondSubSub.attributeName).toEqual("third");
+
+        expect(thirdSub.constructor.name).toEqual("AttributeExistsExp");
+        expect(thirdSub.attributeName).toEqual("fourth");
+    });
 });
 
 describe("Invalid expressions", () => {
diff --git a/src/services/search/services/parse.js b/src/services/search/services/parse.js
index 8ab99fe31..ee23f3807 100644
--- a/src/services/search/services/parse.js
+++ b/src/services/search/services/parse.js
@@ -39,8 +39,12 @@ function getFulltext(tokens, searchContext) {
     }
 }
 
-function isOperator(str) {
-    return str.match(/^[!=<>*%]+$/);
+function isOperator(token) {
+    if (Array.isArray(token)) {
+        return false;
+    }
+
+    return token.token.match(/^[!=<>*%]+$/);
 }
 
 function getExpression(tokens, searchContext, level = 0) {
@@ -129,16 +133,16 @@ function getExpression(tokens, searchContext, level = 0) {
 
             i += 1;
 
-            const operator = tokens[i].token;
+            const operator = tokens[i];
 
             if (!isOperator(operator)) {
-                searchContext.addError(`After content expected operator, but got "${tokens[i].token}" in ${context(i)}`);
+                searchContext.addError(`After content expected operator, but got "${operator.token}" in ${context(i)}`);
                 return;
             }
 
             i++;
 
-            return new NoteContentFulltextExp(operator, {tokens: [tokens[i].token], raw });
+            return new NoteContentFulltextExp(operator.token, {tokens: [tokens[i].token], raw });
         }
 
         if (tokens[i].token === 'parents') {
@@ -228,7 +232,7 @@ function getExpression(tokens, searchContext, level = 0) {
     function parseLabel(labelName) {
         searchContext.highlightedTokens.push(labelName);
 
-        if (i < tokens.length - 2 && isOperator(tokens[i + 1].token)) {
+        if (i < tokens.length - 2 && isOperator(tokens[i + 1])) {
             let operator = tokens[i + 1].token;
 
             i += 2;
@@ -265,7 +269,7 @@ function getExpression(tokens, searchContext, level = 0) {
 
             return new RelationWhereExp(relationName, parseNoteProperty());
         }
-        else if (i < tokens.length - 2 && isOperator(tokens[i + 1].token)) {
+        else if (i < tokens.length - 2 && isOperator(tokens[i + 1])) {
             searchContext.addError(`Relation can be compared only with property, e.g. ~relation.title=hello in ${context(i)}`);
 
             return null;
@@ -384,7 +388,7 @@ function getExpression(tokens, searchContext, level = 0) {
                 searchContext.addError('Mixed usage of AND/OR - always use parenthesis to group AND/OR expressions.');
             }
         }
-        else if (isOperator(token)) {
+        else if (isOperator({token: token})) {
             searchContext.addError(`Misplaced or incomplete expression "${token}"`);
         }
         else {