diff --git a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayAppend.php b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayAppend.php
index 783a834d..15acdb9b 100644
--- a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayAppend.php
+++ b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayAppend.php
@@ -18,6 +18,6 @@ protected function customiseFunction(): void
     {
         $this->setFunctionPrototype('array_append(%s, %s)');
         $this->addNodeMapping('StringPrimary');
-        $this->addNodeMapping('Literal');
+        $this->addNodeMapping('StringPrimary');
     }
 }
diff --git a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayLength.php b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayLength.php
index c25fb061..6fc4c6aa 100644
--- a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayLength.php
+++ b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayLength.php
@@ -18,6 +18,6 @@ protected function customiseFunction(): void
     {
         $this->setFunctionPrototype('array_length(%s, %s)');
         $this->addNodeMapping('StringPrimary');
-        $this->addNodeMapping('Literal');
+        $this->addNodeMapping('StringPrimary');
     }
 }
diff --git a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayPrepend.php b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayPrepend.php
index bc139882..67eda269 100644
--- a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayPrepend.php
+++ b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayPrepend.php
@@ -17,7 +17,7 @@ class ArrayPrepend extends BaseFunction
     protected function customiseFunction(): void
     {
         $this->setFunctionPrototype('array_prepend(%s, %s)');
-        $this->addNodeMapping('Literal');
+        $this->addNodeMapping('StringPrimary');
         $this->addNodeMapping('StringPrimary');
     }
 }
diff --git a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayRemove.php b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayRemove.php
index 1985ef33..8e136983 100644
--- a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayRemove.php
+++ b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayRemove.php
@@ -18,6 +18,6 @@ protected function customiseFunction(): void
     {
         $this->setFunctionPrototype('array_remove(%s, %s)');
         $this->addNodeMapping('StringPrimary');
-        $this->addNodeMapping('Literal');
+        $this->addNodeMapping('StringPrimary');
     }
 }
diff --git a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayReplace.php b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayReplace.php
index 406da127..27a630d7 100644
--- a/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayReplace.php
+++ b/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/ArrayReplace.php
@@ -18,7 +18,7 @@ protected function customiseFunction(): void
     {
         $this->setFunctionPrototype('array_replace(%s, %s, %s)');
         $this->addNodeMapping('StringPrimary');
-        $this->addNodeMapping('Literal');
-        $this->addNodeMapping('Literal');
+        $this->addNodeMapping('StringPrimary');
+        $this->addNodeMapping('StringPrimary');
     }
 }