diff --git a/application/Espo/ORM/QueryComposer/BaseQueryComposer.php b/application/Espo/ORM/QueryComposer/BaseQueryComposer.php
index c5e5474189..2276a76b49 100644
--- a/application/Espo/ORM/QueryComposer/BaseQueryComposer.php
+++ b/application/Espo/ORM/QueryComposer/BaseQueryComposer.php
@@ -1178,7 +1178,7 @@ abstract class BaseQueryComposer implements QueryComposer
 
         $entityType = $entity->getEntityType();
 
-        if (strpos($attribute, ':')) {
+        if (strpos($attribute, ':') && !Util::isArgumentString($attribute)) {
             /** @var int $delimiterPosition */
             $delimiterPosition = strpos($attribute, ':');
             $function = substr($attribute, 0, $delimiterPosition);
diff --git a/tests/unit/Espo/ORM/MysqlQueryComposerTest.php b/tests/unit/Espo/ORM/MysqlQueryComposerTest.php
index 1bb2be770d..5ac8b05b7e 100644
--- a/tests/unit/Espo/ORM/MysqlQueryComposerTest.php
+++ b/tests/unit/Espo/ORM/MysqlQueryComposerTest.php
@@ -3146,4 +3146,16 @@ class MysqlQueryComposerTest extends \PHPUnit\Framework\TestCase
             $this->query->composeSelect($query2)
         );
     }
+
+    public function testStringWithColon(): void
+    {
+        $query = SelectBuilder::create()
+            ->select(["'2020-10-10 20:20:20'"])
+            ->from('Post')
+            ->build();
+
+        $sql = $this->query->composeSelect($query);
+
+        $this->assertIsString($sql);
+    }
 }