diff --git a/src/NodeNameResolver/NodeNameResolver/FuncCallNameResolver.php b/src/NodeNameResolver/NodeNameResolver/FuncCallNameResolver.php
index d9802fa779f..19b95dac056 100644
--- a/src/NodeNameResolver/NodeNameResolver/FuncCallNameResolver.php
+++ b/src/NodeNameResolver/NodeNameResolver/FuncCallNameResolver.php
@@ -49,6 +49,10 @@ public function resolve(Node $node, ?Scope $scope): ?string
             }
         }
 
+        if (is_string($namespaceName)) {
+            return $namespaceName;
+        }
+
         return (string) $node->name;
     }
 }
diff --git a/tests/Issues/AutoImport/Fixture/do_not_rename_different_namespaced_function.php.inc b/tests/Issues/AutoImport/Fixture/do_not_rename_different_namespaced_function.php.inc
new file mode 100644
index 00000000000..96ca045cb02
--- /dev/null
+++ b/tests/Issues/AutoImport/Fixture/do_not_rename_different_namespaced_function.php.inc
@@ -0,0 +1,23 @@
+<?php
+
+final class DontRenameDifferentNamespacedFunction
+{
+    public function run(): void
+    {
+        $addressParts = Psl\Str\split($addressLine, $houseNumber);
+    }
+}
+
+?>
+-----
+<?php
+
+use function Psl\Str\split;
+
+final class DontRenameDifferentNamespacedFunction
+{
+    public function run(): void
+    {
+        $addressParts = split($addressLine, $houseNumber);
+    }
+}
diff --git a/tests/Issues/AutoImport/config/configured_rule.php b/tests/Issues/AutoImport/config/configured_rule.php
index 6a807ca98fe..2210b737b82 100644
--- a/tests/Issues/AutoImport/config/configured_rule.php
+++ b/tests/Issues/AutoImport/config/configured_rule.php
@@ -7,6 +7,7 @@
 use Rector\Php70\Rector\Ternary\TernaryToNullCoalescingRector;
 use Rector\Php80\Rector\Class_\AnnotationToAttributeRector;
 use Rector\Php80\ValueObject\AnnotationToAttribute;
+use Rector\Renaming\Rector\FuncCall\RenameFunctionRector;
 use Rector\Renaming\Rector\Name\RenameClassRector;
 use Rector\Symfony\Symfony44\Rector\ClassMethod\ConsoleExecuteReturnIntRector;
 
@@ -22,4 +23,7 @@
         new AnnotationToAttribute('Doctrine\ORM\Mapping\Entity'),
     ]);
     $rectorConfig->rules([ConsoleExecuteReturnIntRector::class, RemoveUnusedPrivatePropertyRector::class]);
+    $rectorConfig->ruleWithConfiguration(RenameFunctionRector::class, [
+        'split' => 'explode',
+    ]);
 };