diff --git a/src/Psalm/Internal/Provider/ReturnTypeProvider/ArrayMergeReturnTypeProvider.php b/src/Psalm/Internal/Provider/ReturnTypeProvider/ArrayMergeReturnTypeProvider.php
index a461dac8dac..c4002a35fa8 100644
--- a/src/Psalm/Internal/Provider/ReturnTypeProvider/ArrayMergeReturnTypeProvider.php
+++ b/src/Psalm/Internal/Provider/ReturnTypeProvider/ArrayMergeReturnTypeProvider.php
@@ -23,6 +23,7 @@
 use function count;
 use function is_string;
 use function max;
+use function mb_strcut;
 
 class ArrayMergeReturnTypeProvider implements FunctionReturnTypeProviderInterface
 {